COLORING COMPOSITION COMPRISING A COMBINATION OF NATURAL COLORING AGENTS INCLUDING AN EXTRACT OF LAWSONIA INERMIS

Abstract

The present invention relates to a coloring composition comprising as a coloring agent a combination of: an extract A of the aerial parts of Lawsonia inermis containing between 7 and 60% by weight of lawsone in relation to the total weight of the dry extract, wherein the lawsone results especially from the enzymatic hydrolysis of glycosylated derivatives of lawsone, wherein said extract further comprises luteolin, apigenin and 2,3,4,6-tetrahydroxyacetophenone; and at least one other coloring agent B derived from a dye plant other than Lawsonia inermis, from microorganisms or from microalgae.

Description

Coloring composition comprising a combination of natural coloring agents including an extract of Lawsonia inermis TECHNICAL FIELD The invention relates to a coloring composition comprising a combination of natural coloring agents, including an extract of Lawsonia inermis. The invention also relates to the cosmetic use of this composition for dyeing keratin fibers. Finally, the invention relates to a cosmetic method for dyeing keratin fibers comprising the application of this composition. TECHNICAL BACKGROUND Methods for dyeing hair include oxidative or permanent dyeing. This chemical dyeing method uses one or more oxidative dye precursors, usually one or more oxidizing bases optionally combined with one or more couplers. These oxidation bases are colorless or weakly colored compounds that, combined with oxidizing products, allow access, through an oxidative condensation process, to the colored species that are trapped inside the hair fiber. However, oxidation dyes are known to cause skin problems. Furthermore, oxidation dyes have been shown to be endocrine disruptors that negatively impact the ecosystem, and they can also cause cancers, allergies, and similar health issues. Color molecules and dyes can also be natural compounds derived from plants or trees. Lawsonia inermis, commonly known as henna, belongs to the Lythraceae family. This shrub, which can reach a height of 6 meters, grows naturally in the tropical and subtropical regions of Africa and Asia. It has gray bark, dense branching, and quadrangular, spiny branches on the older ones. Its leaves grow opposite each other and are simple and entire. The fragrant flowers, white or red, are grouped in large, pyramidal panicles up to 25 cm long. Henna leaves, which produce red and orange dyes, have been used for over 5000 years to dye hair and skin, or even to dye textiles. Its coloring properties are due to lawsone (2-hydroxy-l,4-naphthoquinone), which reacts with the keratin present in the skin or nails by a Michael addition. EITHER ML / a / ZUZ 1 44 1Z However, with henna alone it is difficult to account for all the nuances of the hair color spectrum, from blonde to dark blonde or even black. Other plants have been described as sources of extract or powder for dye, especially for coloring hair or other keratinous materials. However, each plant produces a particular color. Furthermore, it is difficult to provide a shade that ranges from blonde to dark blonde or even black, and that covers the entire coloring range, particularly hair, using only plant extracts or powders without incompatibilities, therefore limited in number, and using a henna extract as a base. In the field of hair dye, we speak of tone-on-tone dye or permanent or semi-permanent dye; the latter generally uses more hydrogen peroxide and alkaline chemical agents. Tone-on-tone hair dye is generally used to enhance or intensify the natural color of the hair, giving it highlights and lots of shine. Therefore, it is most often chosen in the same color tones as the natural hair or darker. Permanent hair dye can more effectively cover gray hair. In the field of permanent or semi-permanent hair dye, it is desirable that the dye withstands shampooing. The invention relates to both tone-on-tone dye and permanent dye. In particular, the invention aims to provide a coloring composition - that it be natural, without animal products, that is, based on active coloring principles from plants, microorganisms or microalgae - with a short exposure time, advantageously less than one hour for hair coloring - preferably in a single application, even for hair coloring - preferably organic and vegan - that allows good color retention, even after several washes, even after 10 shampoos, advantageously after 15 shampoos, for a hair dye. They are also looking for a hair dye that avoids the use of hydrogen peroxide and alkaline chemical agents. Additionally, it is desirable to be able to obtain all the desired colors. Consequently, there is a real need to develop hair dyes from natural products, particularly plant-based products, including henna, that cover the entire range of hair colors, particularly for a tone-on-tone approach or for a permanent dye approach that allows for gray hair coverage, while limiting the number of plant extracts to simplify formulation and avoid interactions and incompatibilities. MA / a / ZUZI 44 1 z The inventors of the present invention have thus developed a coloring composition based on the combination of a henna extract with at least one second coloring agent, enabling them to achieve the desired results, including a wide range of colors. In particular, for use in hair care, the composition covers the entire spectrum of shades, from black to very light blonde. SUMMARY OF THE INVENTION The invention relates to a coloring composition comprising, as a coloring agent, a combination of: - an extract A of the aerial parts of Lawsonia inermis containing 7 to 60% by weight of lawsone relative to the total weight of the dry extract, wherein the lawsone results especially from the enzymatic hydrolysis of glycosylated derivatives of lawsone, such as henosides, wherein said extract further comprises luteolin, apigenin and 2,3,4,6-tetrahydroxyacetophenone; and - at least one other coloring agent B derived from a dye plant, other than Lawsonia inermis, from microorganisms or from microalgae. The invention also relates to the use of the coloring composition for the cosmetic dyeing of keratin fibers. The invention also relates to a cosmetic method for dyeing keratin fibers, in particular human keratin fibers, comprising the following steps: a) Provide a composition as disclosed herein in powder form, b) Prepare an aqueous composition by adding an aqueous composition, especially water, to the powder from step a) at a temperature between 20 °C and 98 °C and mixing, c) Apply to the keratin fibers, optionally while heating the treated fibers, d) Rinse, and e) Optionally, repeat steps c) and d). The invention also relates to a combined product comprising - a component (X) comprising a combination of extract A from the aerial parts of Lawsonia inermis and at least one coloring agent B as disclosed herein, and - a component (Y) comprising at least one cosmetically acceptable excipient selected from the group comprising a texturizing and / or touch agent, an acidity corrector and mixtures thereof. Other aspects of the invention are described in the claims and / or in this document. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coloring composition comprising as a coloring agent a combination of: MA / a / ZUZI 44 1 z mannitol, sorbitol, xylitol, etc. In particular, the carrier is selected from fructose, maltodextrins and starch, in particular rice starch. The carrier is preferably a natural carrier and / or of natural origin from renewable resources, as opposed to fossil resources, these carriers being advantageously obtainable by environmentally friendly processes. Standardized dry extract is a standardized extract without extraction solvent, or containing it only in a non-significant trace amount. Powder refers to a product in the form of fine particles with an average particle size between 0.1 µm and 250 µm, particularly between 1 µm and 250 µm. These fine particles can be obtained by milling. Milling can be carried out by any suitable means that allows for size reduction and the production of fine particles, as mentioned above. Advantageously, a powder according to the invention is a dry, powdery product with negligible moisture content. A powder according to the invention is soluble in water or readily dispersible in water; that is, it can be used to obtain an aqueous or hydroalcoholic liquid composition containing 20 to 60% by weight of dry matter, more particularly 30 to 50% by weight of dry matter, and more particularly around 40% dry matter. The dry matter thus represents the powder. Plant powder is a pure natural product derived from a plant, whether the whole plant, aerial parts, underground parts, flowers or fruits, including nuts, which are reduced to powder by grinding or any other mechanical means. Aerial parts are the parts of the plant that are above ground, for example, leaves, petioles, flowers, seeds and branches, in particular leaves, branches and petioles, or a mixture of them, preferably leaves, branches or a mixture of them. Glycosylated derivatives of lawsone, also called lawsone glycosides or heterosides, means any compound of the following general formula (I): MA / a / ZUZI 44 1Z where Ri, R2 and R3 represent, independently of each other, H or a sugar, such as glucose, at least one of Ri to R3 being different from H, for which hydrolysis of the glycosidic bond(s) leads to the formation of an aglycone that undergoes an auto-oxidation reaction to form lawsone. In particular, henosides A, B and C are glycosylated derivatives of lawsone. Enzymatic hydrolysis refers to a hydrolysis reaction catalyzed by an enzyme, which may be an endogenous enzyme from Lawsonia inermis or an enzyme from an exogenous source, preferably an endogenous enzyme from Lawsonia inermis, it being understood that said enzyme is a glucosidase, such as a βglucosidase [Gallo et al.], whose action leads to the breaking of the glycosidic bonds of the glycosylated derivatives of lawsone. The terms "stable over time" with reference to an extract of Lawsonia inermis as disclosed herein mean that the amount of lawsone initially present in the extract does not decrease by more than 50%, advantageously not more than 40%, in particular not more than 30%, advantageously not more than 20%, especially not more than 15%, advantageously not more than 10% in 1 month at room temperature (15°C - 25°C), with a relative humidity (RH) of 60%, and protected from light. The room temperature values ​​are those defined in the European Pharmacopoeia. The stability of an extract A, as described herein, can also be evaluated under so-called accelerated stability conditions. These conditions are a temperature of 40°C (± 2) and a relative humidity of 75% (± 5). The lawsone content of an extract is considered stable over time under accelerated stability conditions if the amount of lawsone initially present in the extract does not decrease by more than 50%, advantageously no more than 40%, preferably no more than 30%, particularly no more than 20%, notably no more than 15%, and advantageously no more than 10% within one month. Neutral pH refers to a pH that ranges between 6.5 and 7.5, particularly around 7. Acidic pH refers to a pH less than 7, advantageously less than 6.5, and more advantageously less than 6. Weakly polar refers to a solvent characterized by a dipole moment less than 2.0 D. Alcohol refers to a compound of the formula R4-OH, where R4 is a hydrocarbon group, in particular an alkyl group (Ci-Ce) or a C4-C12 hydrocarbon group. Alcohols comprising an alkyl group (Ci-Co) are referred to herein as Ci-Co alcohols. Alcohols comprising a C4-C12 hydrocarbon group are referred to herein as C4-C12 alcohols. Chlorinated solvent refers to an alkane, that is, a saturated hydrocarbon, containing 1 to 6 carbon atoms, in particular 1 to 3 carbon atoms, in which some or all of the hydrogen atoms are replaced by chlorine atoms. Ketone refers to a compound of formula Rs-CO-Ró, where R5 and Ró are identical or different alkyl (CiCó) groups. Ether refers to a compound of formula R7-O-R8, where R7 and Rs are identical or different alkyl (Ci-Có) groups. MA / a / ZUZI 44 1Z Ester refers to a compound with the formula R9-COO-R10, where R9 and Rio are alkyl groups (Ci-Có) that can be identical or different. The ester can be, in particular, an acetate, that is, a compound with the formula CH3COO-R10. An alkyl group (Ci-Có) refers to a saturated hydrocarbon chain, linear or branched, advantageously comprising 1 to 6, preferably 1 to 4, carbon atoms. Examples include the following groups: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, terebutyl, pentyl, or hexyl. A C4-C12 hydrocarbon chain designates a linear or branched, saturated or unsaturated hydrocarbon chain, preferably saturated, comprising 4 to 12 carbon atoms, preferably 4 to 8 carbon atoms. Examples of C4-C12 hydrocarbon chains include, but are not limited to, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, and any of their positional isomers. Saturated or unsaturated hydrocarbon refers to a compound made up solely of hydrogen and carbon atoms. Keratin fibers refers to the keratin present in the epidermis and integuments, such as the skin, hair, eyelashes, eyebrows, particularly the hairs. Cosmetically acceptable means that it is useful in the preparation of a cosmetic composition, and is generally safe, non-toxic and not undesirable either biologically or otherwise, and that it is acceptable for cosmetic use, especially by topical application to keratin fibers, particularly the hair and scalp. Cosmetically acceptable excipient refers to an excipient containing ingredients suitable for formulating cosmetic compositions, such as cream, lotion, shampoo, emulsion, or any formulation suitable for application to keratin fibers, particularly hair. HENNA EXTRACT A The coloring composition of the present invention comprises at least one particular henna extract, referred to herein as extract A. This extract A is characterized by a high lawsone content. Thus, extract A contains 7 to 60% lawsone by weight relative to the total weight of the dry extract. This lawsone content is advantageously stable over time, even under accelerated stabilization conditions. In some forms, the lawsone content of an extract A does not decrease by more than 50%, advantageously not more than 40%, particularly not more than 30%, advantageously not more than 20%, more advantageously not more than 10%, in 3 months at room temperature (15 °C - 25 °C), with a relative humidity (RH) of 60%, and protected from light. MA / a / ZUZI 44 1Z Advantageously, the lawsone content of an extract A does not decrease by more than 50%, advantageously not by more than 40%, particularly not by more than 30%, advantageously not by more than 20%, more advantageously not by more than 10%, in 6 months at room temperature (15 °C - 25 °C), with a relative humidity (RH) of 60%, and protected from light. Preferably, the lawsone content of an extract A does not decrease by more than 50%, advantageously not more than 40%, particularly not more than 30%, advantageously not more than 20%, more advantageously not more than 10%, in 12 months at room temperature (15 °C - 25 °C), with a relative humidity (RH) of 60%, and protected from light. Advantageously, the lawsone content of an extract A does not decrease by more than 50%, advantageously not by more than 40%, particularly not by more than 30%, advantageously not by more than 20%, more advantageously not by more than 10%, in 3 months at a temperature of 40 °C (± 2) and a RH of 75% (± 5). In particular, the lawsone content of an extract A does not decrease by more than 50%, advantageously not more than 40%, particularly not more than 30%, advantageously not more than 20%, more advantageously not more than 10%, in 6 months at a temperature of 40 °C (± 2) and a RH of 75% (± 5). Therefore, unlike many henna extracts available on the market that have a poor lawsone content, which decreases rapidly over time, particularly by condensation with various compounds comprising an amino group, such as proteins, peptides, or amino acids, Extract A disclosed herein comprises a high and stable amount of lawsone. The lawsone in extract A is usually the result of the enzymatic hydrolysis of glycosylated derivatives of lawsone, such as henosides. A process for preparing this extract is described below. Extract A also comprises luteolin, apigenin and 2,3,4,6-tetrahydroxyacetophenone. An extract A of the aerial parts of Lawsonia inermis containing 7 to 60% by weight of lawsone relative to the total weight of the dry extract, wherein the lawsone is the result of the enzymatic hydrolysis of glycosylated derivatives of lawsone, such as henosides, and wherein said extract further comprises luteolin, apigenin and 2,3,4,6-tetrahydroxyacetophenone, can be prepared according to a procedure as described below. Extract A may be further characterized by one or more of the following advantageous characteristics, advantageously by all of them: Extract A contains from 7% to 50%, or from 10% to 50%, and in particular from 15% to 40% by weight of lawsone relative to the total weight of the dry extract. Advantageously, extract A contains at least 7%, advantageously at least 10%, at least 15%, preferably at least 20%, and more advantageously at least 25% by weight of lawsone relative to the total weight of the dry extract; the percentages are expressed relative to the total weight of said dry extract (before any additions). MA / a / ZUZI 44 1Z eventual of a drying carrier). The lawsone content can be determined in accordance with the HPLC test method described after the examples (method 1). - Extract A contains no more than 2%, preferably no more than 1.5%, and especially no more than 1% by weight of proteins, peptides, or amino acids relative to the total weight of the dry extract, advantageously 0 to 1% by weight or 0.1 to 1% by weight of proteins, peptides, or amino acids relative to the total weight of the dry extract. Free amino acids, peptides, and proteins may be analyzed by ninhydrin spectrophotometry, in accordance with the method described after the examples (Method 2). - Extract A comprises chlorophylls, in particular chlorophyll a and / or chlorophyll b, the total chlorophyll content being less than 25% by weight of the total weight of the dry extract, or less than 20% by weight, advantageously less than 10% by weight of the dry extract. In some embodiments, extract A contains no more than 5%, preferably no more than 2% by weight of chlorophylls of the total weight of the dry extract. In some embodiments, extract A contains no chlorophyll. The chlorophylls may be tested by weight assay in accordance with the method described after the examples (Method 3). Extract A contains from 1% to 40%, advantageously from 2% to 30%, by weight of phenolic compounds relative to the total weight of the dry extract. The phenolic compound content can be determined by spectrophotometry according to the method described after the examples (method 4). - Extract A contains no more than 5% by weight of saccharides relative to the total weight of the dry extract, advantageously from 0.1 to 5%, and more advantageously from 0.5 to 5%, by weight of saccharides relative to the total weight of the dry extract. The saccharide content can be determined by colorimetric assay with dinitrosalicylic acid (Method 5). - Extract A also contains other phenolic compounds, such as gallic acid, coumaric acid (in particular para-coumaric acid) and 3,4,5-trihydroxacetophenone; other flavonoids, such as catechin, 3',4',5,7-tetrahydroxyflavanone, 3',5,7-trihydroxy-4'-methylflavone; sterols, such as β-sitosterol, triterpenes, such as lupeol and / or heterosides thereof, such as lalioside, myrciafenone A, 1,2-dihydroxy4-O-glycosiloxynaphthalene (also called 4-OPD-glucopyranoside), luteolin-4'-O-glucoside, apigenin7-Op-glucoside, luteolin-3'-O-glucoside, apigenin-4'-OP-glucoside and luteolin-6-C-neohesperidoside.In some forms, extract A contains other phenolic compounds, such as gallic acid, coumaric acid (particularly β-coumaric acid) and 3,4,5-trihydroxyacetophenone; other flavonoids, such as catechin, 3',4',5,7-tetrahydroxyflavanone, 3',5,7-trihydroxy-4'-methylflavone and / or their heterosides, such as lalioside, lamirciafenone A, 1,2-dihydroxy-4-O-glucosiloxin, luteolin-4'-O-glucoside, apigenin-7-OP-glucoside, luteolin-3'-O-glucoside, apigenin-4'-OP-glucoside and luteolin-6-Cneohesperiside. ML / a / ZUZ 1 44 1Z - the extract also contains 3,4,5-trihydroxyacetophenone and / or 2-dihydroxy-4-O-glycosiloxynaphthalene. - Extract A also contains coumaric acid, in particular para-coumaric acid; - Extract A also contains 3,4,5-trihydroxacetophenone and / or 2-dihydroxy-4-O-glucosiloxynaphthalene - the extract also contains glycosylated luteolin, in particular luteolin-6-C-neohesperidoside. Flavonoids, such as luteolin and apigenin, have many interesting biological properties, including free radical scavenging and antioxidant effects [Romanov et al., Neoplasma 2001, 48(2), 104-107], as well as anti-inflammatory activity. These properties, combined with their ability to absorb UV light, contribute to their capacity to provide protection against UV radiation [Saewan et al., JAPS 2013, 3(9), 129-141]. Although hair photoprotection is not a commonly discussed topic, the chemical effects of UV radiation and its impact on the hair shaft should not be overlooked [Draelos, DermatoL Clin. 2006, 24, 81-84]. Therefore, the presence of compounds with a photoprotective effect in cosmetic formulations intended for hair coloring is of particular interest. Luteolin and apigenin are also well-known natural dyes, which can be used to dye hair and fabrics. Furthermore, apigenin has been shown to be a hair growth promoting agent [Huh et al. Arch. DermatoL Res., 2009, 301, 381-385]. Polyphenols, such as 2,3,4,6-tetrahydroxyacetophenone, and phenolic acids, such as paracoumaric acid, also have antioxidant and photoprotective properties [Nichols et al., Arch. Dermatol Res. 2010, 302, 71-83]. Extract A may also contain any compounds naturally present in the aerial parts of Lawsonia inermis, particularly in the leaves and / or branches of Lawsonia inermis. In some forms, the extract A disclosed herein may be in the form of a dry extract, advantageously in powder form, especially with a particle size of less than 250 pm. In some embodiments, the extract A disclosed herein may be a standardized extract AN, in particular a standardized dry extract AN. The standardized extract AN, in particular a standardized dry extract AN, comprises extract A of the aerial parts of Lawsonia inermis and a carrier. Thus, in some embodiments, particularly advantageous when the coloring composition is a cosmetic composition, the composition comprises a standardized extract AN, in particular a standardized dry extract AN, obtained by adding an inert carrier to extract A as disclosed herein in order to standardize the lawsone content of the extract. In other words, the dye composition of the present invention comprises an extract A as disclosed herein MA / a / ZUZI / U144 1Z document and an inert carrier, forming extract A and the carrier a standardized extract AN, in particular a standardized dry extract AN. The standardized AN extract is characterized by one or more of the following advantageous characteristics, advantageously by all of them (percentages are expressed by weight in relation to the total weight of the standardized dry extract): • the standardized AN extract comprises from 0.6% to 1.4%, advantageously from 1% to 1.3%, particularly around 1.3% by weight of lawsone; • the inert carrier does not contain proteins; • the inert carrier is cosmetically acceptable; • The carrier is selected from the group consisting of propanediol, pentanediol, glycerin, propylene glycol, methyl THF, and amyl alcohol; or the carrier is selected from the group consisting of sugars or polysaccharide derivatives, such as fructose, glucose, sucrose, maltodextrins, cellulose derivatives, starch (e.g., from corn or rice), agar-agar, gums, mucilages, and polyols such as mannitol, sorbitol, xylitol, etc. • the standardized AN extract contains 3,4,5-trihydroxacetophenone and / or 2-dihydroxy-4-O-glucosiloxynaphthalene; • the standardized AN extract contains coumaric acid, in particular juara-coumaric acid; • the standardized extract AN contains the compounds listed above for extract A; • The standardized dry extract AN contains 0.2 to 3.0% by weight of phenolic compounds; • the standardized dry extract AN contains glycosylated luteolin, in particular luteolin-6C-neohesperidoside; • Standardized dry extract AN contains 0.05 to 1.0% by weight of luteolin; • The standardized dry extract AN contains 0.01 to 0.5% by weight of apigenin; • The standardized dry extract AN contains 0.01 to 0.1% by weight of coumaric acid, in particular of α-rara-coumaric acid; • The standardized dry extract AN contains 0.05 to 1.0% by weight of 2,3,4,6-tetrahydroxyacetophenone; • the standardized dry extract contains no more than 0.2% by weight of proteins, peptides or amino acids, advantageously from 0 to 0.2% by weight, advantageously from 0.1 to 0.2% by weight, of proteins, peptides or amino acids; • the standardized dry extract AN does not contain chlorophylls; MA / a / ZUZI 44 1Z • the standardized dry extract AN contains no more than 0.5% by weight of saccharide compounds, advantageously from 0.01 to 0.5%, advantageously from 0.05 to 0.5% by weight of saccharide compounds; • The standardized dry extract AN meets the stability specifications, even under accelerated conditions, defined above for henna extract A; • The standardized dry extract AN contains at least 80%, advantageously at least 90%, especially at least 92%, in particular at least 95% by weight of carrier. • In some forms, the standardized dry extract AN of Lawsonia inermis comprises, in relation to the total weight of the dry extract: • 0.05 to 1.0% by weight of luteolin; • from 0.01 to 0.5% by weight of apigenin; • 0.05 to 1.0% by weight of 2,3,4,6-tetrahydroxyacetophenone. Preferably, the standardized extract AN is presented as a dry extract, advantageously in powder form, especially with a particle size of less than 250 µm. Preparation of extract A The amount of lawsone found in its free state in the leaves of Lawsonia inermis is actually very small, so preparing Lawsonia inermis extracts with a high lawsone content can be cumbersome. In the plant, lawsone is predominantly present in the form of heterosides [Gallo et al. Rev. Bras. Pharmacogn. 2014, 23, 133-140; COLIPA no. C169, 2013]. Henosides A, B and C, which are monoglycosylated derivatives of lawsone, have been specifically identified. The hydrolysis of these precursors, followed by the auto-oxidation of the resulting aglycone, leads to the formation of lawsone according to the reaction scheme shown below. MA / a / ZUZI 44 1Z OR, Hydrolysis ___________________________________________________I OH 1 ΪΓ OH Oxidation ______________________________________________________________________________i 0 ...... 1 T 1 / OH 'ϊ OR-. * 1.! Jl OH • 1 -..3-- -γ- Ü Ri = glucose, R2 = R3 = H; R2= glucose, Ri = R3 = H; either R3 = glucose, Ri = R2 = H. Therefore, a number of known extraction processes for Lawsonia inermis include an acidic step, typically at a pH between 1 and 3, during which the henosides are hydrolyzed. The inventors of the present invention have developed an extraction process for Lawsonia inermis that yields an extract with a high lawsone content through the enzymatic hydrolysis of glycosylated lawsone derivatives. This extract is also distinguished by its long-term stability. Thus, advantageously, extract A of aerial parts of Lawsonia inermis is obtained by a process comprising the following steps: a) maceration of the aerial parts of Lawsonia inermis in water, at a pH ranging from 4 to 8, so that the glycosylated derivatives of lawsone, such as henosides, initially present in the aerial parts of Lawsonia inermis are partially or totally enzymatically hydrolyzed, to provide an aqueous solution containing lawsone; b) adding an organic solvent to the solution obtained in step a), the organic solvent being chosen from linear or branched C4-C12 alcohols or solvents having a miscibility with water of less than 10%, advantageously less than 5% by weight at 25 °C, to provide an aqueous phase and an organic phase; c) recover the organic phase obtained in step b); and d) Concentrate the organic phase recovered in step c), to obtain an extract rich in lawsone A. Specifically, the aerial parts of Lawsonia inermis subjected to maceration in step a) are leaves, branches, or mixtures thereof. The leaves may be fresh or dried, preferably dried. Step a) is preferably carried out at a temperature between 20 °C and 60 °C, or between 20 °C and 50 °C, in particular between 25 °C and 45 °C, more particularly between 30 °C and 45 °C, typically at about 40 °C. It is understood that step a) is carried out at a pH that allows the enzyme or enzymes that catalyze the hydrolysis of the glycosylated derivatives of lawsone to function. In particular, step a) is carried out at a pH between 4 and 8, preferably between 5 and 7.5, advantageously between 5.5 and 7.5, typically at neutral pH. The aerial parts of Lawsonia inermis are typically macerated for 15 minutes to 2 hours, preferably for 15 minutes to 1 hour, advantageously for about 30 minutes. In some modalities, step (a) is carried out under agitation for 15 minutes to 2 h, preferably for 15 minutes to 1 h, advantageously for about 30 minutes. The aerial parts of Lawsonia inermis are typically macerated in a volume of water whose weight is 2 to 15 times greater, advantageously 5 to 15 times greater, more advantageously 6 to 10 times greater, typically 10 times greater than the weight of the aerial parts of Lawsonia inermis. For example, when the process is implemented on 100 g of aerial parts of Lawsonia inermis, the volume of water MA / a / ZUZI 44 1Z used in step a) can vary from 200 mL to 1500 mL, or from 500 mL to 1500 mL, advantageously from 600 mL to 1000 mL, typically it is 1000 mL. In some variations, a pectinase-type enzyme may be added in step a). In some embodiments, the organic solvent is added directly to the aqueous solution obtained in step a). In these embodiments, the aqueous solution comprises the plant material and the maceration water. In these embodiments, it should be understood that the organic solvent is added directly to the aqueous solution obtained in step a), meaning that no filtration step is performed between steps a) and b). In some embodiments, the process includes a filtration step between step a) and step b) that allows the aerial parts of Lawsonia inermis to be separated from the aqueous solution containing lawsone. Alternatively, in some embodiments, the process includes a filtration step between step c) and step d) that allows the aerial parts of Lawsonia inermis to be separated from the organic phase recovered / collected in step c). Step b) can be performed in batches or continuously. In some particular batch processing methods, step b) of the process comprises the following 3 sub-steps: bl) addition of an organic solvent to the aqueous solution obtained in step a); b.2) stirring the solution obtained in step b.1) for 15 minutes to 2 hours, particularly for 15 minutes to 1 hour, typically for about 30 minutes; and b. 3) decant the mixture obtained in step b.2), until two distinct phases are obtained, i.e., an aqueous phase and an organic phase. Thus, the succession of sub-steps bl), b.2) and b.3) leads to the formation of an aqueous phase and an organic phase. The volume of organic solvent added during step b), in particular during step bl), is such that the ratio of the volume of said organic solvent added during b) to the volume of water used during step a) is between 0.25 and 2, especially between 0.5 and 2, especially between 0.8 and 1.5, in particular between 1 and 1.3. In some embodiments, the organic solvent added during step b), particularly during step bl), of the process disclosed herein is a weakly polar solvent. It is stated that, despite being weakly polar, this organic solvent solubilizes the lawsone. Thus, the solubility of lawsone in the organic solvent added in b), particularly in step bl), is greater than 70%, especially greater than 80%, and advantageously greater than 90% by weight at 25 °C; the percentages are expressed relative to the total weight of lawsone present in the aqueous solution containing lawsone obtained in step a). ML / a / ZUZ 1 44 1 z In some embodiments, the organic solvent added during step b), in particular during step bl), of the procedure disclosed herein is selected from the group consisting of Ci-Ci alcohols, chlorinated solvents, ketones, ethers, esters and mixtures thereof that satisfy the following criteria - the miscibility of water in said organic solvent is less than 10%, advantageously less than 5% by weight at 25 °C, - the miscibility of said organic solvent in water is less than 10%, advantageously higher than 5% by weight at 25 °C. In particular, the organic solvent may be selected from the group consisting of n-amyl alcohol, dichloromethane, chloroform, methyl isobutyl ketone, diethyl ether, diisopropyl ether, dibutyl ether, methyl tert-butyl ether, alkyl acetates (Ci-Ce), such as ethyl acetate, isopropyl acetate, butyl acetate, isoamyl acetate, and any mixture thereof. In some embodiments, the organic solvent added in step b), particularly during step bl), is an alkyl acetate (Ci-Co) or a mixture of alkyl acetates (Ci-Ce), preferably selected from the group consisting of ethyl acetate, isopropyl acetate, butyl acetate, isoamyl acetate, and any mixture thereof. Preferably, the organic solvent is isopropyl acetate. In some embodiments, the organic solvent added in step b) is a C4-C12 linear or branched alcohol, preferably a C4-C8 linear or branched alcohol. Advantageously, the organic solvent is of biological origin. Advantageously, the organic solvent is a linear or branched C4-C12 alcohol selected from the group consisting of n-butanol, sec-butanol, isobutanol and any mixture thereof, most particularly n-butanol. C4-C12 alcohols have the advantage of not degrading during recycling operations, unlike esters such as ethyl or isopropyl acetate, or certain ketones (acetone in particular). Furthermore, the presence of residual water in the recycling solvent does not pose any application problems. In conclusion, this type of solvent facilitates solvent recycling on an industrial scale. Step c) consists of recovering the organic phase obtained in step b). It is possible to repeat step b) on the aqueous phase obtained in the previous iteration of step b). The new organic phase thus obtained is recovered (repetition of step c)) and combined with the result of the previous iteration of step b). Thus, in one variant of the process, step d) consists of a dj step of concentrating the combination of organic phases recovered from several iterations of step b) followed by step c). In some embodiments, the process may contain an additional step e) of drying the lawsone-rich extract obtained in step d). At the end of step e), the lawsone-rich extract obtained is a dry extract. Step (e) of drying may be carried out in accordance with methods well known to the expert. In particular, the drying step may be carried out by paddle dryer, vacuum drying, spray drying, microwave drying, zeodrying, or freeze-drying. In some embodiments, the process may include, between steps c) and d), an additional step c') of adding a carrier, and step d) is followed by the drying step mentioned above e). At the end of said step e), the lawsone-rich extract obtained is a standardized dry extract. According to some preferred embodiments, the process does not include any step of changing the pH of the aqueous solution or aqueous phase by adding acid or base. According to some preferred embodiments, the process also includes a pigment extraction step, also called a bleaching step. The pigments removed during the bleaching step are primarily chlorophylls. However, it is noted that lawsone is not among the pigments that the bleaching step is intended to remove. The pigment extraction step can be carried out, in particular, with an organic solvent that does not readily dissolve lawsone. Thus, the solubility of lawsone in the organic solvent used for the bleaching step is less than 15%, especially less than 10%, and advantageously less than 5% by weight at 25 °C; the percentages are expressed relative to the total weight of lawsone contained in the extract or solution undergoing the bleaching step. Preferably, lawsone is not soluble in the organic solvent used for the pigment extraction weight. Advantageously, this organic solvent is either a saturated or unsaturated hydrocarbon. Specifically, the saturated hydrocarbon can be chosen from pentane, hexane, heptane, nonane, decane, cyclohexane, and mixtures thereof. The unsaturated hydrocarbon can be, in particular, benzene. Preferably, the extraction step of pigments such as chlorophyll is carried out with heptane. The pigment extraction step performed with an organic solvent can consist of a liquid-liquid or liquid-solid extraction. When it comes to a liquid-liquid extraction, this step is inserted between steps a) and b) of the disclosed process. Advantageously, the liquid-liquid extraction decolorization step using an organic solvent comprises the following 4 sub-steps: (i) the addition of said organic solvent to the aqueous solution obtained in step (a), (ii) the stirring of the solution obtained in step (i), with a stirring duration of between 15 minutes and 2 hours, in particular between 15 minutes and 1 hour, the typical stirring duration being approximately 30 minutes, and ML / a / ZUZ 1 44 1Z iii) the decantation of the mixture obtained in step ii), until two distinct phases are obtained, namely, an aqueous phase and an organic phase, and iv) the removal of the organic phase. Step b) of the process is then carried out in the aqueous phase resulting from step iii). In the case of liquid-solid extraction, this step follows drying step e) of the process. Liquid-solid extraction can be carried out using methods well known to the expert. Alternatively, the decolorization step can be carried out using supercritical CO2, with or without the addition of a co-solvent, directly on the dry extract. The chlorophyll is carried away by the supercritical CO2. The residue is the decolorized dry extract. COLORING AGENT B The coloring composition according to the invention also comprises a coloring agent B derived from a dye plant other than Lawsonia inermis, or from microorganisms or microalgae. Preferably, the coloring agent B is in dry form, advantageously in powder form, especially with a particle size of less than 250 pm. Coloring agent B may be a powder from a dye plant, other than Lawsonia inermis, or from microorganisms or microalgae. Coloring agent B may be an extract from a dye plant other than Lawsonia inermis, or from microorganisms or microalgae. The extract will most often be an aqueous, hydroalcoholic, or alcoholic extract. Advantageously, coloring agent B is derived from at least one dye plant, other than Lawsonia inermis, selected from the group consisting of Indigofera plants, red pigment source plants, red or purple to black pigment source plants, yellow pigment source plants, red to blue-green pigment source plants, tannin source plants, brown pigment source plants, and combinations thereof. In particular, Indigofera plants are selected from the true indigo tree (Indigofera tinctoria), dyer's knotweed (Polygonum tinctorium or Persicaria tinctoria), dyer's indigo (Isatis tinctoria L.), Couroupita guianensis (cannonball tree), wild indigo (Baptisia tinctoria), dyer's croton (Chrozophora tinctoria), dyer's oleander (Wrightia tinctoria), Yoruba indigo (Philenoptera cyanescens = Lonchocarpus cyanescens), L. laxiflorus (Lonchocarpus laxiflorus), Marsdenia tinctoria (Asclepiadaceae), Chinese rainbell (Strobilanthes cusia or Strobilanthes flaccidifolius) and combinations thereof. Advantageously, coloring agent B comprises indirubin and / or leucoindigo. Advantageously, coloring agent B is an extract of indigo leaves, in particular an aqueous or hydroalcoholic or alcoholic extract, or an indigo leaf powder. MA / a / ZUZI 44 1Z Advantageously, coloring agent B is an extract of dyer's knotweed leaves, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of dyer's knotweed leaves. Advantageously, coloring agent B is a dyer's indigo leaf extract, in particular an aqueous or hydroalcoholic or alcoholic extract, or a dyer's indigo leaf powder. Advantageously, coloring agent B is an extract of flowers and / or fruits of Couroupita guianensis, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of flowers and / or fruits of Couroupita guianensis. Advantageously, coloring agent B is an extract of the whole wild indigo plant, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of the whole wild indigo plant. Advantageously, coloring agent B is an extract of the whole dyer's croton plant, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of the whole dyer's croton plant. Advantageously, coloring agent B is an extract of the whole dyer's oleander plant, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of the whole dyer's oleander plant. Advantageously, coloring agent B is an extract of Yoruba indigo leaves, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of Yoruba indigo leaves. Advantageously, coloring agent B is an extract of L. laxiflorus leaves, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of L. laxiflorus leaves. Advantageously, coloring agent B is an extract of the whole Marsdenia tinctoria plant, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of the whole Marsdenia tinctoria plant. Advantageously, coloring agent B is an extract of the whole Chinese rainbell plant, in particular an aqueous or hydroalcoholic or alcoholic extract, or a powder of the whole Chinese rainbell plant. Advantageously, coloring agent B is derived from at least one dye plant that is a source of red pigment. In particular, the red pigment source plants are selected from sorghum, hibiscus, and combinations thereof. Advantageously, coloring agent B comprises anthocyanins. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of aerial parts, particularly the stem, of sorghum, or a powder of aerial parts, particularly the stem, of sorghum. In the case of an extract, the extraction solvent, advantageously aqueous or hydroalcoholic, advantageously has a pH MA / a / ZUZ 1 44 1Z acid, advantageously lower than 6. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of hibiscus flowers, particularly dried flowers (karkade), or a hibiscus flower powder, particularly dried flowers (karkade). In the case of an extract, the extraction solvent, advantageously aqueous or hydroalcoholic, advantageously has an acidic pH, advantageously less than 6. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is derived from at least one dye plant that is a source of red or violet to black pigment. In particular, the source plant of red or violet to black pigment is logwood. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of logwood, particularly heartwood, or a logwood powder, particularly heartwood. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is derived from at least one dye plant that is a source of yellow pigment. In particular, the yellow pigment source plants are selected from gardenia, turmeric, saffron, birch, chamomile, mignonette, and combinations thereof. Advantageously, coloring agent B comprises crocins. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of gardenia fruit or a powder of gardenia fruit. Said coloring agent B may be extracted from the gardenia described in application WO2018162760. In particular, the gardenia extract or powder contains a crotin fraction by weight of between 0.1 and 10%, preferably between 1 and 5%, relative to the total weight of the dry extract or dry powder. Gardenia extract can be a fluid extract, aqueous or hydroalcoholic, or a dry extract. Specifically, this is an aqueous extract. A fluid extract of gardenia, more particularly an aqueous or hydroalcoholic extract, can be the liquid fraction (more or less viscous) obtained after extraction and liquid-solid separation, containing 20% ​​to 60% dry extract, more particularly 30% to 50% dry extract, and even more specifically, approximately 40% dry extract in the aqueous or hydroalcoholic solvent. The extract can also be in the form of a dry extract once the aqueous or hydroalcoholic solvent evaporates from the fluid extract. This extract is typically powdery and has an average particle size between 0.1 µm and 250 µm, particularly between 1 µm and 250 µm. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of turmeric rhizome or a turmeric rhizome powder. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. MA / a / ZUZI 44 1Z Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of saffron stigma or saffron stigma powder. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of birch leaves or a birch leaf powder. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of chamomile flowers, especially the ligule, or a powder of chamomile flowers, especially the ligule. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of mignonette roots or a powder of mignonette roots. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is derived from at least one dye plant that is a source of blue-green pigment. In particular, the blue-green pigment source plants are selected from elderberry, bilberry, Virginia cherry, and combinations thereof. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of elderberry fruit or an elderberry fruit powder. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of cranberry fruit or a cranberry fruit powder. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of Virginia cherry fruit or a powder of Virginia cherry fruit. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is derived from at least one dye plant that is a source of tannins. In particular, the tannin source plants are selected from chestnut, Emblica officinalis, pomegranate, and combinations thereof. In this case, the aim is for the tannin plants to darken the color, particularly to shades of gray or dark brown. Advantageously, coloring agent B comprises tannins. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of chestnut wood or a chestnut wood powder. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. MA / a / ZUZI 44 1Z Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of the fruit of Emblica officinalis or a powder of the fruit of Emblica officinalis. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of pomegranate fruit, especially the pericarp, or a pomegranate fruit powder, especially the pericarp. In the case of a hydroalcoholic extract, the alcohol is advantageously miscible with water, such as ethanol. Advantageously, coloring agent B is derived from at least one dye plant that is a source of chestnut pigment. In particular, the source plant of chestnut pigment is rhapontic. Advantageously, coloring agent B is an aqueous or hydroalcoholic extract of rhapontic roots or a rhapontic root powder (Rheum rhaponticum root powder). All the extracts and powders mentioned above can be labeled organic, meaning they do not involve a chemical synthesis step and can be obtained using environmentally friendly methods. They can also be labeled vegan. The invention may also provide for the use of extracts obtained by semi-synthetic or synthetic methods. In particular, coloring agent B may be chlorophyllin. Chlorophyllin is a source of green pigment. Chlorophyllin can be obtained by extraction in accordance with a semi-synthetic method that includes a saponification step of chlorophyll. Plants rich in chlorophyll can be selected, in particular, from alfalfa, white mulberry, nettle, algae and combinations thereof. Chlorophyll can be extracted, for example, from the aerial parts of alfalfa with an organic solvent such as acetone, alcohols, alkanes (hexane or heptane) or supercritical CO2. Chlorophyll can be extracted, for example, from the aerial parts of the white mulberry tree using an organic solvent such as acetone, alcohols, alkanes (hexane or heptane) or supercritical CO2. Chlorophyll can be extracted, for example, from the aerial parts of the nettle with an organic solvent such as acetone, alcohols, alkanes (hexane or heptane) or supercritical CO2. Chlorophyll can be extracted, for example, from the thallus of algae with an organic solvent such as acetone, alcohols, alkanes (hexane or heptane) or supercritical CO2. BENEFICIAL AGENT The composition according to the invention may also comprise a beneficial agent, in particular an agent that promotes the fixation of the dye to its substrate, especially cellulose fibers and / or keratin fibers. ML / a / ZUZ 1 / U144 1 z The beneficial agent is preferably in dry form, advantageously in the powder form, especially with a particle size of less than 250 pm. The beneficial agent can also be a plant extract or a plant powder. For example, cassia (neutral henna) can be used to promote the adhesion of henna extract A to cellulose and / or keratin fibers. It can also add shine to the hair. For example, aloe vera, particularly the juice extract from aloe vera leaves, can be used as a natural mordant, meaning it promotes the adhesion of the coloring agent. It can also nourish and moisturize keratin fibers and protect them from UV radiation. Aloe vera also contains anthraquinones, such as aloe aloin and emodin, resins, tannins, and polysaccharides. A juice / gel can be extracted from aloe vera leaves, consisting primarily of water and polysaccharides, such as pectins, hemicelluloses, glucomannans, acemannans, and mannose derivatives. This juice / gel may also contain amino acids, lipids, sterols such as lupeol and campesterol, and enzymes. The beneficial agent can be a fructan such as inulin because of its keratin fiber coating properties. COMPOSITION The composition according to the invention comprises henna extract A and at least one coloring agent B. It may further comprise a beneficial agent as described above and / or one or more additional coloring agents as described below. Advantageously, it comprises a limited number of coloring agents not exceeding 10 coloring agents, advantageously no more than 5 coloring agents, more advantageously no more than 4 coloring agents, even more advantageously no more than 3 coloring agents. It is particularly advantageous to note that a wide range of colors, specifically the entire spectrum of colors desired in hair dyeing, can be obtained using henna extract A with a limited number of coloring agents. This limited number reduces the risk of intolerance and incompatibility and is more economical. Furthermore, the combination in accordance with the invention provides a coloring composition that is: - natural, without animal products, i.e., based on pigments from plants, microorganisms or microalgae; - with a short exposure time, advantageously less than one hour for dyeing hair; - preferably in a single application, even for dyeing hair; - preferably organic and vegan; - which allows good color retention, even after several washes, even after 10 shampoos, advantageously after 15 shampoos, for a hair dye. The invention also allows for the preparation of a hair dye that does not require the use of hydrogen peroxide. It may also not require the use of alkaline chemical agents. The particularly advantageous combinations are: - henna extract A, in particular henna extract AN, and a logwood extract, - henna extract A, in particular henna extract AN and a logwood powder, - henna extract A, in particular henna extract AN, and a sorghum extract, - henna extract A, in particular henna extract AN, and a sorghum powder, - henna extract A, in particular henna extract AN, and a gardenia extract, - henna extract A, in particular henna extract AN, and a gardenia powder, - henna extract A, in particular henna extract AN, and chlorophyllin, - henna extract A, in particular henna extract AN, and an extract of the Indigofera plant, - henna extract A, in particular henna extract AN, and an Indigofera plant powder. In one particular embodiment, the coloring composition according to the invention comprises from 10 to 90%, in particular from 10 to 50%, or from 50 to 90% by weight of AN standardized henna extract, the weight of the standardized extract being expressed as dry extract, in relation to the total dry weight of the composition. In one particular embodiment, the coloring composition according to the invention comprises from 10 to 90%, especially from 10 to 50%, or from 50 to 90% by weight of coloring agent B, the weight of coloring agent B being expressed as dry extract, in relation to the total dry weight of the composition. Extracts, and in particular henna extract A, can be standardized; the carrier will be found in the composition. The carrier can be specially selected from propanediol, pentanediol, glycerin, propylene glycol, methyl THF, and amyl alcohol. When the coloring composition according to the invention is in powder form, the carrier is preferably selected from sugars and polysaccharide derivatives, such as fructose, glucose, sucrose, maltodextrins, cellulose derivatives, starch (e.g., corn, wheat, or rice starch), agar-agar, gums, mucilages, and polyols such as mannitol, sorbitol, xylitol, etc. In particular, the carrier is selected from fructose, maltodextrins, and starch, particularly rice starch. When the coloring composition according to the invention is in powder form, the expert can adjust its particle size by any method well known to him. MA / a / ZUZI 44 1Z In particular, a coloring composition according to the invention may be in powder form, with a particle size of less than 250 pm. The composition may further comprise one or more acceptable excipients, in particular one or more cosmetically acceptable excipients suitable for application in human keratin fibers (such as those disclosed below). Advantageously, the composition is free of the stabilizers that are usually present in herma compositions to stabilize lawsone. Advantageously, the coloring composition according to the invention is free from additives consisting of synthetic colorants, such as diaminotoluenes and diaminobenzenes, in particular PPD (para-phenylenediamine) which is the most commonly used, or heavy metals [Wang et al. J. environ. Anal. Toxicol. 2016, 6(3); Wang et al. J. Chromatogr. B 2011, 879, 1795-1801]. COSMETIC COMPOSITION The coloring composition is preferably a cosmetic composition, which can be formulated to be administered topically externally. The cosmetic composition according to the invention can be formulated in the form of various preparations suitable for topical administration and include, in particular, creams, emulsions, milks, ointments, lotions, oils, aqueous or hydroalcoholic or glycolic solutions, powders, sprays, shampoos, varnishes or any other product for external application. The cosmetic dye composition advantageously comprises a cosmetically acceptable excipient. In particular, the composition according to the present invention may also comprise at least one cosmetically acceptable excipient known to a person skilled in the art, selected from surfactants, texturizing and / or feel agents, preservatives, fragrances, colorants, chemical or mineral UV filters, moisturizing agents, mineral waters, acidity regulators, etc. A person skilled in the art knows how to adapt the formulation of the composition according to the invention using their general knowledge. In particular, the composition comprises at least one acidity regulator, advantageously selected from organic acids, in particular citric acid, acetic acid, carbonates and bicarbonates, in particular sodium, calcium or potassium bicarbonate. In particular, the composition may comprise at least one texturizing and / or touch agent, advantageously chosen from maltodextrin, fructans such as inulin, bamboo silica, cellulose, polysaccharides such as guar gum, xanthan gum, alginate, carrageenan, locust bean gum, gum arabic, acacia gum, konjac, pectins, as well as combinations thereof; MA / a / ZUZI 44 1Z Advantageously, the composition comprises xanthan gum or a combination of xanthan gum and acacia gum. The cellulose may be, in particular, a cellulose ether, such as carboxymethylcellulose or hydroxypropyl methylcellulose. In some embodiments, the dye composition according to one of the preceding claims further comprises at least one beneficial agent as disclosed herein and / or at least one cosmetically acceptable excipient as disclosed herein, preferably selected from texturizing and / or touch agents, acidity regulators and mixtures thereof. KITS OR COMBINED PRODUCTS The invention also relates to a kit or combined product, comprising the following components: a component (X) comprising a combination of extract A from the aerial parts of Lawsonia inermis according to the invention and at least one coloring agent B as defined above and a component (Y) comprising at least one cosmetically acceptable excipient. This excipient can be defined as above for the cosmetic composition, and in particular selected from the group comprising a texture and / or feel agent, an acidity corrector and mixtures thereof. Advantageously, component (Y) is a hair care product selected from the group comprising shampoo, conditioner, hair balm, hair lotion, hair cream, etc. Component (X) is advantageously available in dry form, especially as a powder. METHODS AND USES The invention also relates to the use of a composition according to the invention for the cosmetic dyeing of keratin fibers, especially human fibers. In such a case, standardized henna extract AN is preferably used. It has been effectively demonstrated that the composition can comprise a limited number of coloring agents and yet cover the entire range of colors desired for a hair dye, whether tone-on-tone or permanent. The composition according to the invention also allows for obtaining a palette of shades in both colors and tones. The dye can also cover gray hair more effectively. Another advantage of the invention, and of the composition according to the invention, is that the color obtained, particularly on keratin fibers such as hair, is maintained despite repeated washings. MA / a / ZUZI 44 1Z Thus, advantageously, the colored keratin fibers do not exhibit a reduction in brightness of more than 8 units, advantageously no more than 6 units, more advantageously no more than 5 units, even more advantageously no more than 4 units, even more advantageously no more than 3 units, followed by 10, advantageously 15, washes after dyeing, brightness assessed by measuring the dE* parameter, in accordance with the protocol described in the examples. Another advantage of the invention, and of the composition according to the invention, is that the dye is obtained with a short exposure time, advantageously less than one hour for a hair dye. It can also be obtained in a single application. The present invention also relates to a cosmetic method for dyeing keratin fibers comprising applying a composition according to the invention to the keratin fibers, optionally followed by rinsing. In particular, the cosmetic method for dyeing keratin fibers, especially human ones, comprises the following steps: a) To provide a composition in accordance with the invention, in particular in dry form, especially in powder form, b) Prepare an aqueous composition by adding an aqueous composition, especially water, to the powder from step a) at a temperature between 20 °C and 98 °C and mixing, c) Apply to the keratin fibers, optionally while heating the treated fibers, d) Rinse, e) Optionally, repeat steps c) and d). Advantageously, steps c) and d) are not repeated. It is observed that a small amount of the composition according to the invention, with a small amount of water, could be sufficient to dye the hair of an adult. Traditionally, with a natural dye comprising a powder or a plant extract, it is recommended to mix at least 100 g of powder with at least 300 g of water, resulting in a very thick poultice that is unpleasant to handle and apply. According to the invention, during step a), advantageously less than 50 g of powder of the composition according to the invention is provided, more advantageously less than 30 g, even more advantageously less than 25 g, for example from 15 g to 30 g, advantageously from 15 g to 25 g, more advantageously approximately 20 g. During step b) water is advantageously added in sufficient quantity to prepare a composition of 100 g 150 g. MA / a / ZUZI 44 1Z The water added can be room temperature water or hot water (hot tap water). The hot water temperature can be at least 50°C, advantageously at least 70°C, or even at least 90°C, such as that easily obtained in a kettle. Thus, just 100 to 150 g of the aqueous mixture is enough to obtain a preparation that can be applied to the head. The resulting mixture has a pleasant texture, unlike the very thick and unpleasant poultice-like appearance of well-known natural dyes. The application steps can be those already used for chemical hair dye, with an exposure time step before the rinsing step. In particular, the exposure time step also includes a heating step, specifically at a temperature between 25°C and 65°C, advantageously between 30°C and 60°C, and specifically 55°C or 35°C. Alternatively, the exposure time step can be carried out at room temperature, specifically between 20°C and 30°C, without additional heat input and therefore without the heating step. Advantageously, the exposure time is short, i.e., less than 1 hour, preferably less than 45 minutes. Advantageously, application step c) is carried out at a temperature ranging from 20°C to 55°C for a time between 15 min and 1 hour, more advantageously between 15 min and 45 min. Application step c) can be performed on dry or wet keratin fiber strands. In one form, the dye is a tone-on-tone dye. In particular, the dye is a blonde dye on blonde hair. In this case, the coloring agent B is advantageously chosen from a gardenia extract, a gardenia powder, or a combination thereof. In particular, the dye is a red dye on blonde or red hair. In this case, the coloring agent B is advantageously chosen from a sorghum extract, a sorghum powder, or a combination thereof. Specifically, the dye is a dark blonde tint applied to blonde, red, or dark blonde hair. In this case, the coloring agent B is advantageously chlorophyllin. Alternatively, the cosmetic method for dyeing keratin fibers, particularly human ones, comprises the following steps: a) Providing an extract A in accordance with the invention, optionally with at least one cosmetically acceptable excipient as defined above, particularly in dry form, especially in powder form, b. 1) Prepare an aqueous composition by adding an aqueous composition, especially water, to the powder from step a. 1) at a temperature between 20 °C and 98 °C and mixing, cl) Apply the composition from step bl) to the keratin fibers, optionally while heating the fibers thus treated, MA / a / ZUZI 44 1Z dl) Rinse, a.2) Providing an extract B in accordance with the invention, optionally with at least one cosmetically acceptable excipient as defined above, particularly in dry form, especially in powder form, b.2) Prepare an aqueous composition by adding an aqueous composition, especially water, to the powder from step a.2) at a temperature between 20 °C and 98 °C and mixing, c.2) Apply the composition from step b.2) to the keratin fibers, optionally while heating the fibers thus treated, d.2) Rinse, e) Optionally, but not preferably, repeat steps c.1) and dl) and / or c.2) and d.2). Alternatively, the cosmetic method for dyeing keratin fibers, especially human ones, comprises the following steps: a) Providing an extract B in accordance with the invention, optionally with at least one cosmetically acceptable excipient as defined above, particularly in dry form, especially in powder form, b. 1) Prepare an aqueous composition by adding an aqueous composition, especially water, to the powder from step a. 1) at a temperature between 20 °C and 98 °C and mixing, cl) Apply the composition from step bl) to the keratin fibers, optionally while heating the fibers thus treated, dl) Rinse, a.2) Providing an extract A in accordance with the invention, optionally with at least one cosmetically acceptable excipient as defined above, particularly in dry form, especially in powder form, b.2) Prepare an aqueous composition by adding an aqueous composition, especially water, to the powder from step a.2) at a temperature between 20 °C and 98 °C and mixing, c.2) Apply the composition from step b.2) to the keratin fibers, optionally heating the fibers thus treated, d.2) Rinse, e) Optionally, but not preferably, repeat steps cl) and dl) and / or c.2) and d.2). The steps of these two alternatives are advantageously carried out as described above, with the necessary adjustment in view of the sequencing. The present invention also relates to a method for tattooing the skin. The present invention also relates to a textile dye or furniture paint comprising a composition in accordance with the invention. MA / a / ZUZI 44 1Z Said dye or paint may also comprise one or more additional colorants or pigments. The dye or paint according to the present invention may also comprise any adjuvant known to the skilled worker, who knows how to adjust the formulation of the dye or paint according to the invention using his general knowledge. The present invention also relates to a use of said dye or paint for dyeing textile fibers or painting wood fibers. The invention also relates to the use of a composition according to the invention for coloring cellulosic materials such as textile fibers, wood fibers, etc. The present invention also relates to a vegetable ink comprising an extract according to the invention or a composition according to the invention. The coloring composition according to the invention may also be a printing ink comprising extract A, extract B and suitable excipients, in particular selected from oils and resins, as well as mixtures thereof. The present invention also relates to the use of a coloring composition obtained in accordance with the invention as vegetable ink, for example for printing on paper or cardboard. FIGURES Figure 1 represents the normalized UHPLC-UV chromatogram of an extract obtained by the process in accordance with example 2 (sample E2). Figure 2 represents the same chromatogram as in Figure 1: the filled peaks correspond to those that can be seen in Figure 1, while the flat line corresponds to a zoom of that chromatogram. Figures 3a, 3b, 3c, 3d and 3e represent the UV spectra of lawson, luteolin, apigenin, γ-coumaric acid and 2,3,4,6-tetrahydroxyacetophenone, isolated from sample E2. Figure 4 represents the normalized UHPLC-UV chromatogram of an extract obtained by the process in accordance with Example 4. The following examples illustrate the invention. Characterization A) Structural Analysis Materials and methods Chromatographic separations were performed on a Waters ACQUITY UHPLC system equipped with a quaternary pump, an autosampler, an in-line degasser, an automatic thermostatic column oven, and a DAD detector (200–500 nm). A column was used MA / a / ZUZI 44 1Z ACQUITY UPLC BEH Shield RP18 (100 mm x 2.1 in, 1.7 pm) equipped with a Vanguard™ precolumn (5 mm x 2.1 in) (Waters Corporation, Milford, USA) at 35 °C and the flow rate was set at 0.4 mL / min. The mobile phase consisted of a linear gradient system of (A) water with 0.1% formic acid and (B) acetonitrile and (C) methanol as a washing solvent: 0-9 min, 2%-100% B; 9-9.55 min, maintain 100% B; 9.55-9.70 min, 0%-100% C; 9.7-10.2 min, maintain 100% C; 10.20-10.35 min, 0%-100% B; 10.35-10.85 min, maintain 100% B; 10.85-11 min, 0%-98% A; maintained at 98% A - 2% B for 1 min to balance the column. The compounds were identified by high-resolution mass spectrometry and ID and 2D NMR experiments (Ή NMR, 13C NMR, DEPT, COSY, HMBC, HSQC). B) Quantitative analysis: experimental conditions Luteolin and apigenin were assessed by analytical HPLC using a C18 column (XBridge 100 C18; 3.5 mm, 150 mm x 4.6 mm) under gradient conditions (see below) with H2O / 0.1% trifluoroacetic acid (A) and Acetonitrile / 0.1% trifluoroacetic acid (B) as eluent: Gradient conditions: tO A 18% B 82% ; ti min: A 18% B 82%; 10 min A 50% B 50% ; 10.1 min: A 18% B 82% UV detection was performed at 340 nm for apigenin and 310 nm for luteolin. The flow rate was 1 mL / min and the temperature was 40°C. Pure luteolin, apigenin, and p-coumarin were used for calibration. Example 1: Isopropyl acetate extract according to the invention Fifty grams of uncrushed Lawsonia inermis leaves are extracted with 500 mL of water at 30–40°C for 30 minutes. Six hundred milliliters of isopropyl acetate are added to this solution, and the mixture is stirred for 30 minutes. After decantation, the upper isopropyl acetate phase (480 mL) is recovered, and the aqueous phase, being practically free of lawsone, is separated. The isopropyl acetate phase is filtered and dried using a rotary evaporator. The residue is the dry henna extract. The plant contains 1.5 g of lawsone / 100 g of dried plant. The upper phase of isopropyl acetate contains 80.7% of the lawsone potential present in the plant. Dry henna extract contains 30.2% by weight of lawsone, that is, 71% of the lawsone present in the plant. Stability study: sample stored at 25 °C, 60% relative humidity and protected from light: At T0: lawsone content = 30.2% by weight of lawsone in relation to the weight of the dry extract. In month TI: lawsone content = 29.7% by weight of lawsone in relation to the weight of the dry extract; therefore, there is no significant loss in the sense of the present invention. MA / a / ZUZI 44 1Z Example 2: Isopropyl acetate extract No. 2 according to the invention. 49.5 g of uncrushed Lawsonia inermis leaves are extracted with 500 mL of water at 30–40 °C for 30 min. 600 mL of isopropyl acetate are added to this solution, and the mixture is stirred for 30 min. After decantation, the upper isopropyl acetate phase is recovered and filtered through a Büchner funnel (K900). The residue is rinsed with 50 mL of isopropyl acetate. The resulting solution is dried using a rotary evaporator. The residue is the dry henna extract (sample E2). Dry henna extract (sample E2) contains 30.9% by weight of lawsone. Results UHPLC-UV Chromatogram The UHPLC-UV chromatogram obtained is shown in Figures 1 and 2. The peaks that can be observed in a zoom of this chromatogram (Figure 2, flat line) have been associated with the following compounds: 15 lawsone 1 2 gallic acid lyoside 3 4 myrciafenone A catechin 5 6 2,3,4,6-tetrahydroxyacetophenone l,2-dihydroxy-4-O-glucosiloxynaphthalene 7 10 luteolin-4'-O-glucoside para-coumaric acid 11 12 apigenin-7-Op-glucoside luteolin-3'-O-glucoside 13 14 apigenin-4'-O-β-glucoside 3,4,5-trihydroxyacetophenone 19 20 3',4',5,7-tetrahydroxyflavanone luteolin 21 22 3',5,7-trihydroxy-4'-methylylavone apigenin UV Spectra The UV spectra of the compounds corresponding to peaks No. 15, 20, 22, 10 and 5 are shown in Figures 3a, 3b, 3c, 3d and 3e, respectively. Quantitative analysis Materials and methods Batch samples • LP110: Herma AN extract, ethyl acetate extract standardized with maltodextrin industrial scale. • ES310: Henna extract AN, ethyl acetate extract standardized with maltodextrin laboratory scale. • JQ137A: AN Henna Extract, Henna Isopropyl Acetate Extract with Fructose - Laboratory Scale. The lawsone in each of the above standardized extracts is equal to 1.1% by weight. Results: MA / a / ZUZI 44 1Z Sample Mass (mg) Vol (mL) V iny (pg) Qiny(pg) luteolin apigenin p-coumaric acid LP110 1 215.5 20 5 0.0951 0.0132 0.0234 LP110 2 266.1 20 5 0.1191 0.0163 0.0281 LP110 3 233.1 20 5 0.1029 0.0157 0.0256 ES3310 4 265.8 20 5 0.2348 0.0484 0.0285 ES3310 5 217.25 20 5 0.195 0.0285 0.0238 ES3310 6 227 20 5 0.2376 0.0307 0.0262 JQ137A7 235.9 20 5 0.1015 0.0178 0.0159 JQ137A8 222.6 20 5 0.1039 0.0188 0.0161 JQ137A9 227.7 20 5 0.1158 0.0195 0.0176 Extract Average content (weight %) luteolin apigenin β-coumaric acid LP110 0.18% 0.03% 0.04% ES3310 0.38% 0.06% 0.04% JQ137A 0.19% 0.03% 0.03% Example 3: Standardized dry extract of ethyl acetate according to the invention. 50 g of crushed Lawsonia inermis leaves are extracted with 500 mL of water at 30-40°C for 30 min. 600 mL of ethyl acetate are added to this solution. The mixture is stirred for 30 minutes. After decantation, the upper ethyl acetate phase is recovered, and the aqueous phase is discarded due to its very low lawsone content. The lawsone content of the ethyl acetate phase is determined by HPLC, and maltodextrin is added in sufficient quantity to obtain a mixture containing 1.3% by weight of lawsone, which is then lyophilized. Maltodextrin-standardized henna dry extract contains 1.1% by weight of lawsone, i.e., 71% of the initial lawsone content in the plant. Example 4: n-butanol extract according to the invention Fifty grams of uncrushed Lawsonia inermis leaves are extracted with six volumes of water at 30–40 °C for 30 minutes. Six volumes of n-butanol are added to this solution at room temperature. This mixture is stirred for 30 minutes. After decantation, the butanol phase is recovered, and the aqueous phase, being practically free of lawsone, is discarded. The organic phase is concentrated by passing it through water. The lawsone content in the n-butanol phase is determined by HPLC. Maltodextrin is added in a sufficient amount to obtain a mixture containing 1.1 to 1.3 wt% lawsone. The concentrate is dried to obtain a powder. Results UHPLC-UV Chromatogram The UHPLC-UV chromatogram obtained is shown in Figure 5. The peaks observed have been associated with the following compounds: MA / a / ZUZI 44 1Z Resolution time Compound 4.47 lawsone 3.38 2,3,4,6-tetrahydroxyacetophenone 5.34 luteolin 5.96 apigenin The presence of glycosylated luteolin is observed, in particular luteolin-6-C-neohesperidoside and coumaric acid. Method 1: HPLC assay of luteolin This method can be applied to: A. the lawsone assay in an extract B. the assay of total lawsone present in free form or in the form of glycosylated derivatives of lawsone in the aerial parts of Lawsonia inermis, obtained by acid hydrolysis, and thus quantify the lawsone potential in the plant, C. the enzyme-formed lawsone assay. Reagents Lawsona > 97% (HPLC) SIGMA- ref: H46805 Dichloromethane for analysis. Sulfuric acid for analysis. Methanol for analysis. HPLC grade water. HPLC grade acetonitrile. HPLC grade trifluoroacetic acid. HPLC conditions - Column: XBridge C18, 3.5 pm, 4.6 x 150 mm Waters Oven: 40°C - Solvents: SA: 0.1% trifluoroacetic acid in water. SB: 0.1% trifluoroacetic acid in acetonitrile. - Gradient: T0 min 40% SA; T 1 min 40% SA; T 10 min 5% SA; T 11 min 5% SA; T 11.1 min 40% SA. - Wavelength: λ=278 nm. - Flow rate: 1 mL / min - Injection: 10 pL. Sample preparation: For whole or roughly crushed leaves: 50 g of leaves are crushed and sieved through a 0.355 pm sieve. For powdered leaves: 50g of leaf powder are used as is. Preparation of solutions • Control solutions: Lawsone solution at 0.3 mg / mL in 1 / 1 methanol / ethanol. Dilute to 1 / 10, 1 / 20, 1 / 100 in 1 / 1 methanol / water. • Test solutions: • Test solution A (assay for lawsone present in an extract) MA / a / ZUZI 44 1Z Dissolve 50 mg of extract in 100 mL of 1:1 methanol / water. Dissolve using ultrasound. Filter through Acrodisc GFGHP. Inject 10 pL. • Test solution B (total lawsone assay) Place 80 mg of leaf powder into a volumetric flask. Add 50 mL of 2N H2SO4. Heat to 97 °C for 30 minutes. Allow to cool. Add methanol to make 100 mL. Filter the solution through Acrodisc GF GHP 0.45 pm. Inject 10 pL of the filtrate. • Test solution C (assay for lawsone formed by enzymes) Place 80 mg of leaf powder into a volumetric flask. Add 50 mL of demineralized water. Place in an ultrasonic bath for 30 minutes at 30–40 °C. Allow to cool. Add methanol to make 100 mL. Filter the solution through Acrodisc GF GHP 0.45 pm. Inject 10 pL of the filtrate. Results Use the regression line calculated with the control solutions to determine A. the lawsone content of the extract, B. the total lawsone content, and / or C. the lawsone content formed by the enzymes. Method 2: Testing for nitrogen-containing compounds (amino acids, proteins) Free amino acids and proteins can be analyzed before or after hydrolysis using ninhydrin spectrophotometry. The results are expressed as a percentage of amino acids relative to asparagine. Total protein and amino acid assay Principle Colorimetric assay of amino acids using the ninhydrin reagent after acid hydrolysis. Results are expressed as a percentage of total amino acids relative to asparagine. Reagents: • Citrate buffer solution (pH=5) Dissolve 2.1 g of citric acid in 20 mL of water, add 20 mL of 1 N sodium hydroxide and adjust to 50 mL with water. • Ninhydrin reagent: Dissolve 0.08 g of tin(II) chloride (SnCh, 2H2O) in 50 mL of citrate buffer solution (pH=5). Dissolve 2 g of ninhydrin in 50 mL of ethylene glycol monometal ether (EGME). Mix the two solutions. • 6N Hydrochloric Acid Dilute to 1 / 2 of concentrated hydrochloric acid (36%). • Dilute me Mix 100 mL of 1-propanol with 100 mL of water. Preparation of solutions • Preparation of the calibration curve Dissolve 17 mg of asparagine in 100 mL of water. • Preparation of the test solutions Weigh approximately 30 to 200 mg of extract depending on the sample to be analyzed (pe\) into a screw cap tube, add 2 mL of HC1 6N. Seal tightly and place for about 16 hours at 110 °C. Neutralize with 3N sodium hydroxide (methyl red changes color) and then adjust to 20 ml with water. Rehearsal ML / a / ZUZ 1 / U144 1Z T0.1 T0.2 T0.5 Test Blank Control solution (mL) 0.1 0.2 0.5 - - Test solution (mL) - - - 0.2 - Water (mL) 1 1 1 1 1 Ninhydrin reagent (mL) 1 1 1 1 1 Remove and place in a water bath at 100°C for 20 minutes. Cool in an ice bath. Adjust to 10 ml with dilute me. Measure the absorbance at 570 nm of the different solutions against the blank. Calculations Construct the calibration curve. Deduce from it the total amino acid concentration (Qaat), expressed as asparagine, in the test solutions. The total amino acid content (Taat) of the extract is given by the following formula: TAAT(%) Qaat X 100 X 20 peí with Qaat in mg / ml and pe / in mg Method 3: Chlorophyll Weight Assay The chlorophyll content of the extract can be assessed by the weight obtained after washing the extract with heptane. The extract is taken with 10 volumes of methanol. After shaking for 15 minutes, the solution is filtered. The supernatant is dried and constitutes the chlorophyll-containing fraction. Method 4: Spectrophotometric assay of phenolic compounds The content of phenolic compounds in the extract can be evaluated by spectrophotometry in accordance with the method of the European Pharmacopoeia, version 9.0, 2.8.14. The solutions to be analyzed are prepared by dissolving 25 mg of extract in 100 mL of water. The content of phenolic compounds is expressed by reference to pyrogallol. Method 5: Colorimetric assay of saccharide compounds before and after hydrolysis Principle: Colorimetric determination of saccharide compounds using dinitrosalicylic acid (DNS) in comparison to glucose before and after hydrolysis. The results are expressed as the percentage of saccharide compounds relative to glucose. Reagents: DNS Reagents: Dissolve 30 g of sodium potassium ditartrate in 50 mL of water. Add 20 mL of 2N sodium hydroxide. Dissolve 1 g of dinitrosalicylic acid (DNS) by gentle heating. Make up to 100 mL with water. Preparation of the solutions: Preparation of the calibration curve: dissolve 5 mg of glucose in 10 mL of water. Preparation of hydrolyzed test solutions (total saccharide compounds): Weigh approximately 1 g of extract (pe2). Add 1 mL of 4N H2SO4. Heat under reflux for 2 hours. Neutralize with 1N sodium hydroxide and transfer to a 20 mL volumetric flask. Make up to 20 mL with water. Preparation of non-hydrolyzed test solutions (free saccharide compounds = monosaccharides): Weigh about 10 g of extract (e.g.) into a 20 mL volumetric flask. Fill to 20 mL with water. MA / a / ZUZI 44 1Z Dosage: The solutions are dosed according to the following table: T0.5 TI TL5 T2 Tests Blank Control solution (mi) 0.5 1 1.5 2 - - Test solution (mi) - - - - 1 - Water (mi) 1.5 1 0.5 0 1 2 DNS 1 1 1 1 1 1 Shake and then place in a 100 °C water bath for 5 minutes. Cool in an ice bath and make up to 10 mL with water. Measure the absorbance at 540 nm of the different solutions against the blank. Calculate: Build the calibration curve. Determine the concentration of total saccharide compounds (Qsrt) and free saccharides (Qsrl), expressed as glucose, in the test solutions. The total saccharide titer (Tsrt) of the extract is given by the following formula: MA / a / ZUZI 44 1Z Tsrt (%) — Qsrt X 100 X 20 pe2 With QSRT in mg / ml and ρβ2 in mg The free saccharide titer (Tsrl) of the extract is given by the following formula: TSRL(%) = Qsrlx100 X 20 With Qsrl in mg / ml and pe3 in mg Method 6: Determination of the dE* parameter Color is measured using a reflectance colorimeter (CR400 Chroma Meter, Minolta, France). The color parameters measured by this device, L*a*b*, describe the colors of the strands. The evaluated parameter is a derivative of L*a*b, that is, the color difference (dE*). [Mathematics 4] dE *= ^((^ - C2)2+ («2 - aD2+ (¿2 - &í)2) Where Ll*, ai*, bi* are the coordinates in the CIELAB color space established in 1976 by the International Commission on Illumination of the first color to be compared and L2*, a2*, b2* those of the second.

Claims

1. A coloring composition comprising as a coloring agent a combination of: - an extract A of the aerial parts of Lawsonia inermis containing between 7 and 60% by weight of lawsone in relation to the total weight of the dry extract, wherein the lawsone results especially from the enzymatic hydrolysis of glycosylated derivatives of lawsone, such as henosides, wherein said extract further comprises luteolin, apigenin and 2,3,4,6-tetrahydroxyacetophenone; and - at least one other coloring agent B derived from a dye plant other than Lawsonia inermis, from microorganisms or from microalgae.

2. The coloring composition according to claim 1, wherein extract A of the aerial parts of Lawsonia inermis further comprises coumaric acid.

3. The coloring composition according to claim 1 or 2, wherein extract A of the aerial parts of Lawsonia inermis contains no more than 2% by weight of proteins, peptides or amino acids in relation to the total weight of the dry extract.

4. The dye composition according to any one of the preceding claims, wherein the composition comprises a standardized dry extract AN of Lawsonia inermis comprising extract A of the aerial parts of Lawsonia inermis and a carrier, the standardized dry extract AN comprising 0.6 to 1.4% by weight of lawsone in relation to the total weight of the standardized dry extract.

5. The coloring composition according to claim 4, wherein the standardized dry extract AN of Lawsonia inermis comprises, in relation to the total weight of the dry extract: - from 0.05 to 10% by weight of luteolin; - from 0.01 to 0.5% by weight of apigenin; - from 0.05 to 10% by weight of 2,3,4,6-tetrahydroxyacetophenone.

6. The coloring composition according to any one of the preceding claims, wherein the extract A of the aerial parts of Lawsonia inermis is obtained by a process comprising the following steps: a) macerating the aerial parts of Lawsonia inermis in water, at a pH ranging from 4 to 8, so that the glycosylated derivatives of lawsone, such as henosides, initially present in the aerial parts of Lawsonia inermis are partially or totally enzymatically hydrolyzed, to provide an aqueous solution containing lawsone; MA / a / ZUZI 44 1Z b) adding an organic solvent to the solution obtained in step a), the organic solvent being selected from linear or branched C4-C12 alcohols or solvents having a miscibility with water of less than 10%, advantageously less than 5% by weight at 25 °C, to provide an aqueous phase and an organic phase; c) recovering the organic phase obtained in step b);(yd) concentrate the organic phase recovered in step c), to obtain an extract A as indicated in any of claims 1 to 3.; 7. The coloring composition according to claim 6, wherein step a) is carried out in accordance with at least one of the following conditions: - step a) is carried out at a temperature ranging from 20°C to 60°C; - step a) is carried out at a pH ranging from 5 to 7.5; - step a) is carried out with stirring for 15 minutes to 2 hours; - step a) is carried out in a volume of water whose weight is 2 to 15 times greater than the weight of the Lawsonia inermis aerial parts subjected to maceration.

8. The dye composition in accordance with any one of the foregoing, wherein the coloring agent B is derived from at least one dye plant selected from the group consisting of - Indigofera plants, preferably from the true indigo tree (Indigofera tinctoria), dyer's knotweed (Polygonum tinctorium or Persicaria tinctoria), dyer's indigo (Isatis tinctoria L.), Couroupita guianensis (cannonball tree), wild indigo (Baptisia tinctoria), dyer's croton (Chrozophora tinctoria), dyer's oleander (Wrightia tinctoria), Yoruba indigo (Philenoptera cyanescens = Lonchocarpus cyanescens), L.laxiflorus (Lonchocarpus laxiflorus), Marsdenia tinctoria (Asclepiadaceae), Chinese rainbell (Strobilanthes cusia or Strobilanthes flaccidifolius) and combinations thereof; red pigment source plants, preferably from sorghum, hibiscus and combinations thereof; red or purple to black pigment source plants, preferably logwood; yellow pigment source plants, preferably from gardenia, turmeric, saffron, birch, chamomile, mignonette and combinations thereof; red to blue-green pigment source plants, preferably from elderberry, bilberry, Virginia cherry and combinations thereof; tannin source plants, preferably from chestnut, Emblica officinalis, pomegranate and combinations thereof; MA / a / ZUZI 44 1Z chestnut pigment source plants, preferably rhapontic; and combinations thereof.

9. The coloring composition according to one of the preceding claims, wherein the coloring agent B is chlorophyllin.

10. The coloring composition according to any one of the preceding claims further comprising at least one beneficial agent and / or at least one cosmetically acceptable excipient, preferably selected from texture and / or feel agents, at least one acidity regulator and mixtures thereof.

11. Use of a coloring composition as described in any of the preceding claims for the cosmetic dyeing of keratin fibers, in particular human keratin fibers.

12. A cosmetic method for dyeing keratin fibers, especially human keratin fibers, comprises the following steps: a) Providing a composition as described in any of claims 1 to 10 in powder form, b) Preparing an aqueous composition by adding an aqueous composition, especially water, to the powder of step a) at a temperature between 20 °C and 98 °C and mixing, c) Applying onto the keratin fibers, optionally while heating the fibers thus treated, d) Rinsing, and e) Optionally, repeating steps c) and d).

13. The method according to claim 12 comprising an exposure time before the rinsing step of less than 1 h.

14. The method according to claim 12 or 13, wherein the application step is performed at a temperature ranging from 20 to 55 °C.

15. A combined product comprising a component (X) comprising a combination of extract A from the aerial parts of Lawsonia inermis and at least one coloring agent B as defined in any of claims 1 to 10, and a component (Y) comprising at least one cosmetically acceptable excipient selected from the group comprising a texturizing and / or feel agent, an acidity regulator, and mixtures thereof