Exterior material coordination tool and how to choose exterior material colors

Abstract

To provide an exterior material coordination tool and a method for selecting a color of an exterior material which can be used for designing appropriate for a long usage of a building.SOLUTION: An exterior material coordination tool 10 is a tool for selecting a color of an exterior material of a building. The exterior material coordination tool 10 includes: a plurality of first display units 11 forming a chromatic first line-up; and a plurality of second display units 12 forming an achromatic second line-up. The first display units 11 display different colors. The second display units 12 display different colors. Achromatic colors include chromatic colors of which chroma is less than 0.8. The chroma of the first display unit 11 is at least 0.8 and less than 3.5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an exterior material coordination tool for coordinating the color of an exterior material of a building, and a method for selecting a color of an exterior material. [Background technology]

[0002] Traditionally, the exterior color of a building has been determined with consideration given to the local landscape. For example, in the technology described in Patent Document 1, a color chart for buildings is used to determine the exterior color of a building. In this technology, color information is selected based on the appearance of the building. Then, within a predetermined range in the color chart for buildings, a guidance area that matches the selected color information is determined, and then, within the guidance area, the exterior color of the target building is determined. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-222557 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for longer life spans for buildings due to various reasons, such as longer life spans for people and the realization of a sustainable society. For example, the spread of long-lasting, high-quality housing is being promoted. From a similar perspective, designs that are based on the premise of long-term use of buildings are also required for the exterior appearance of buildings. Therefore, we provide an exterior material coordination tool and a method for selecting exterior material colors that can be used for designing buildings suitable for long-term use. [Means for solving the problem]

[0005] (1) An exterior material coordination tool that solves the above-mentioned problems is an exterior material coordination tool for selecting colors for exterior materials of a building, and has a plurality of first display sections constituting a first lineup of chromatic colors and a plurality of second display sections constituting a second lineup of achromatic colors, the plurality of first display sections display colors different from one another, the plurality of second display sections display colors different from one another, the achromatic colors include chromatic colors having a saturation of less than 0.8, and the saturation of the colors of the first display sections is within the range of 0.8 or more and less than 3.5.

[0006] According to this configuration, the colors displayed by the first display unit and the second display unit in the exterior material coordination tool are achromatic colors or low-saturation chromatic colors. Achromatic colors and low-saturation chromatic colors are commonly seen in natural objects such as wood and stone, so they blend in with the Japanese landscape and are unlikely to look out of place or out of date even if trends change with the times. In this way, it is possible to propose exterior material colors that are suitable for long-term use of buildings.

[0007] (2) In the exterior material coordination tool described in (1) above, the color saturation of the first display portion is within a range of 1.0 or more and less than 1.5. According to this configuration, since the chroma of the first display section is less than 1.5, the color of the first display section brings out the natural colors around the building, such as the green of plants, the red or yellow of autumn leaves, etc. (hereinafter, the natural colors around the building). The natural colors around the building are colors that always exist regardless of changes in the times. The color of the above-mentioned first display section can bring out the natural colors around the building. In this way, it is possible to propose exterior material colors that are suitable for long-term use of buildings.

[0008] In addition, the second display portion is an achromatic color. The achromatic color makes the natural color surrounding the building stand out. The exterior material coordination tool including the first display portion of a low saturation color and the second display portion of an achromatic color can suggest exterior material colors suitable for long-term use of the building from among chromatic and achromatic colors.

[0009] (3) In the exterior material coordination tool described in (2) above, the hue of the color of the first display portion is within a range of 7.5YR or more and 10YR or less, and 1.0Y or more and less than 5.0Y, in the Munsell color system.

[0010] The color of the first display section configured in this way is a color that makes the natural color of the building stand out, and is a color that harmonizes with the colors used for the exterior materials of buildings that have stood the test of time in Japan. Buildings that have stood the test of time in Japan can be said to have universal colors that blend in with the Japanese landscape. For this reason, it is possible to propose exterior material colors that are suitable for the long-term use of buildings.

[0011] (4) In the exterior material coordination tool described in any one of (1) to (3) above, the lightness of the color of the first display portion and the lightness of the color of the second display portion are within a range of not less than 3.0 and not more than 9.0.

[0012] Natural colors such as mountains, rivers, valleys, and oceans contain almost no colors with a brightness lower than 3.0 during the day. In addition, natural colors such as mountains, rivers, valleys, and oceans contain almost no colors with a brightness higher than 9.0 during the day. Since the brightness of the color of the first display section and the brightness of the color of the second display section are equal to or greater than 3.0 and less than 9.0, when the color of the first display section and the color of the second display section are adopted as the exterior material of a building, the color of the first display section and the color of the second display section are unlikely to cause discord with natural colors. Therefore, according to this configuration, it is possible to propose exterior material colors suitable for long-term use of buildings.

[0013] (5) In the exterior material coordination tool described in (4) above, the color brightness of the first display portion and the color brightness of the second display portion are in the range of 3.0 or more and 5.0 or less, or in the range of 6.0 or more and less than 9.0.

[0014] In many buildings, plants are arranged around the building. In addition, buildings are built in places where plants such as trees in mountains, crops planted in fields, roadside trees, and plants in parks can be seen. The typical value of the brightness of the plants (plants and plants around the building) is generally greater than 5.0 and less than 6.0 throughout the four seasons. When the brightness of the building and the brightness of the plants overlap, even if the hue of the building and the hue of the plants are different, the building and the plants may have the same color tone, and the overall appearance of the building and the plants may be monotonous. In this regard, according to the above configuration, the brightness of the first display unit and the brightness of the second display unit are different from the brightness of the plants, so that when plants are arranged around the building, it is possible to propose an appropriate color that does not make the overall appearance of the building and the plants not monotonous.

[0015] (6) In the exterior material coordination tool described in any one of (1) to (5) above, each of the plurality of first display units and the plurality of second display units belongs to one of a plurality of groups divided by lightness, and a difference in lightness between the first display units and the second display units belonging to one of the groups and the first display units and the second display units belonging to the other groups is 1 or more for all combinations.

[0016] With this configuration, when selecting two colors from the exterior material coordination tool, the two colors can be easily selected so that the brightness difference is at least 1. For example, when planning a residential area consisting of multiple buildings, or when using two colors for the exterior of one building, it is easy to select two colors that clearly show the difference between the two colors.

[0017] (7) In the exterior material coordinating tool according to any one of (1) to (6) above, the first display unit and the second display unit are provided on a base board. With this configuration, the exterior material coordinating tool is easy to carry.

[0018] (8) In the exterior material coordination tool described in any one of (1) to (6) above, the first and second display sections are displayed on a display screen of an electronic device. With this configuration, the first and second display sections are less susceptible to color deterioration due to ultraviolet rays than when they are printed.

[0019] (9) A method for selecting a color of an exterior material that solves the above problem is a method for selecting a color of an exterior material of a building using any one of the exterior material coordination tools (1) to (8) above, comprising a first step of setting the color of the area in which the building is to be constructed as a base color, and a second step of selecting a color from the first lineup or the second lineup that has a brightness difference of 1.5 or more with the base color as the color of the exterior material, wherein the color of the area is the color of a building material produced in the area, or the color of a building material used in a building that is a landmark of the area.

[0020] According to this configuration, when a color specific to a region in which a building is to be constructed is adopted for the building, a color can be selected that does not overshadow the color of the region and is suitable for the long-term use of the building.

[0021] (10) A method for selecting a color of an exterior material that solves the above problem is a method for selecting a color of an exterior material of a building using any one of the exterior material coordination tools (1) to (8) above, and includes a first step of setting a green view ratio in an exterior perspective image of the building, and a second step of selecting a color of the exterior material from the first lineup or the second lineup by referring to a color selection chart based on the green view ratio, the color selection chart being a chart in which the lightness of the color increases as the green view ratio decreases. With this configuration, the color of the exterior material of the building can be selected based on the green view ratio. Therefore, the lightness of the entire building can be kept within an appropriate range.

[0022] (11) A method for selecting a color of an exterior material that solves the above problem is a method for selecting a color of an exterior material of a building using any one of the exterior material coordination tools (1) to (8) above, comprising a first step of setting the orientation of the facade of the building, and a second step of selecting the color of the exterior material from the first lineup or the second lineup by referring to a color selection table based on the orientation of the facade, in which an east-facing facade is associated with the second lineup, a south-facing facade is associated with the first lineup and the second lineup, a west-facing facade is associated with the first lineup, and a north-facing facade is associated with the first lineup and the second lineup in the color selection table. With this configuration, it is possible to propose colors that make the building look beautiful during the time period when the sun shines on the building.

[0023] (12) In the method for selecting a color for an exterior material described above in (11), if the orientation of the facade of the building is set to face north in the first step and two colors are adopted for the north-facing facade, then in the second step, two colors are selected from the first lineup and the second lineup so that the brightness difference is 2.0 or more.

[0024] In the case of a north-facing facade, the facade is in shade during the day, so if two colors are used on the north-facing facade, the difference between the two colors becomes difficult to see. In this regard, the above configuration makes it possible to propose two colors that clearly show the difference in color on the north-facing facade. Effect of the Invention

[0025] The exterior material coordination tool and exterior material color selection method disclosed herein can contribute to designing buildings suitable for long-term use. [Brief description of the drawings]

[0026] [Figure 1] FIG. 2 is a schematic diagram of an exterior material coordinating tool for the first embodiment. [Diagram 2] A tone diagram used in the color analysis of an image. [Diagram 3] This is an image scale used in color analysis of images. [Figure 4] 10 is a flowchart showing a method for selecting a color of an exterior material of a building in the second embodiment. [Diagram 5] FIG. 13 is a diagram showing an exterior perspective drawing of a building to which a base color has been set. [Figure 6] FIG. 1 is a schematic diagram of an exterior material coordination tool showing the recommended color range. [Figure 7] 13 is a flowchart showing a method for selecting a color of an exterior material of a building in the third embodiment. [Figure 8] FIG. 1 is a diagram showing a perspective drawing of the exterior of a building showing the planting area. [Figure 9] FIG. 1 illustrates a color selection chart. [Figure 10] 13 is a flowchart showing a method for selecting a color of an exterior material of a building in the fourth embodiment. [Figure 11] FIG. 13 is a diagram showing a color selection table. [Figure 12] This is a diagram of the facade of a north-facing building. [Figure 13] FIG. 13 is a schematic diagram of a residential area in the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] First Embodiment [Exterior material coordination tool] An exterior material coordinating tool 10 will be described with reference to Figures 1 to 3. In Figure 1, parameters A / B accompanying first display section 11 and second display section 12 indicate lightness / saturation.

[0028] The exterior material coordination tool 10 supports the selection of colors for the exterior material 7 of the building 1 in the design of the building 1. The designer designs the building 1 based on the customer's requests regarding the design. The designer also proposes a design for the building 1 based on local regulations regarding the building 1. In recent years, from the perspective of sustainability and extending the lifespan of the building 1, there is a demand for universal designs, designs that do not get boring, or designs that harmonize with the surroundings of the building 1. The exterior material coordination tool 10 supports the creation of a design that takes into account the perspective of extending the lifespan of the building 1. The exterior material coordination tool 10 supports the designer in the selection of colors in the creation of a design that takes into account the perspective of extending the lifespan of the building 1. The exterior material coordination tool 10 has been created on the premise that the building 1 will be built in Japan.

[0029] The exterior material coordination tool 10 is a tool for selecting the color of the exterior material 7 of the building 1.

[0030] The exterior materials 7 include exterior wall materials constituting the outer surface of the exterior wall 6, members constituting the retaining wall, and exterior wall materials constituting the outer surface of the fence. The exterior wall 6 and the exterior wall materials of the fence include tiles, exterior paints, exterior sheets, stone materials, concrete materials, synthetic resin panels, metal panels, ceramic plates, ceramic members, and wood. The exterior material coordinating tool 10 is created for each of the various exterior materials 7. The exterior material coordinating tool 10 for the exterior wall material is different from the exterior material coordinating tool 10 for the retaining wall. The exterior material coordinating tool 10 for the exterior wall material may be created separately for each material. For example, the exterior material coordinating tool 10 for the exterior wall material made of ceramic plates and the exterior material coordinating tool 10 for the exterior wall material made of stone are created separately. In addition, the exterior material coordinating tool 10 for the exterior wall material that can be commonly used regardless of the material may be created.

[0031] The exterior material coordination tool 10 has a first lineup of chromatic colors and a second lineup of achromatic colors. The first lineup of chromatic colors includes a plurality of first display sections 11. The plurality of first display sections 11 display colors different from one another. The second lineup of achromatic colors includes a plurality of second display sections 12. The plurality of second display sections 12 display colors different from one another.

[0032] In the present disclosure, achromatic colors include colors whose hues are difficult to judge by the naked eye. For example, a gray color that is perceived to have a slight bluish tint is an achromatic color. In the present embodiment, achromatic colors include chromatic colors whose saturation is less than 0.8.

[0033] The first display unit 11 and the second display unit 12 are provided on a base board 20. The base board 20 is made of a plate material or a sheet material.

[0034] The first display unit 11 and the second display unit 12 display colors. In one example, the first display unit 11 and the second display unit 12 are configured with a rectangular or circular sheet whose surface is filled with a predetermined color. The first display unit 11 and the second display unit 12 may be configured with a photograph of the surface of a predetermined building material. The first display unit 11 and the second display unit 12 may be configured with a sample of an exterior material. The first display unit 11 and the second display unit 12 may be configured with a model of the sample of an exterior material.

[0035] The first display unit 11 and the second display unit 12 are provided with color symbols so that the displayed colors can be understood. The color symbols are values ​​including hue, brightness, and saturation. The color symbols are displayed near the first display unit 11 and the second display unit 12, respectively. An example of a color symbol is the Munsell value. The Munsell value can be converted from other color symbols. For example, the Munsell value can be found by converting the RBG value, the CMYK value, or the HEX value using a predetermined formula.

[0036] When the first display section 11 and the second display section 12 are formed by printing using an electronic computer and a printer, the color symbols of the first display section 11 and the second display section 12 can be specified based on color parameters (e.g., RGB values) in the electronic computer.

[0037] When the first display unit 11 and the second display unit 12 are configured by a sample of an exterior wall material, a color chart is used to identify the color symbols of the colors of the first display unit 11 and the second display unit 12. When the first display unit 11 and the second display unit 12 are configured by a sample of an exterior wall material, the color symbols may be identified based on color parameters (e.g., RGB values) of pixel data of a digital image of the sample of the exterior wall material.

[0038] [1st display section] The saturation of the color of the first display section 11 is within a range of 0.8 or more and less than 3.5. Preferably, the saturation of the color of the first display section 11 is within a range of 1.0 or more and less than 1.5. That is, the exterior material coordination tool 10 does not display chromatic colors with a saturation of 3.5 or more. The exterior material coordination tool 10 displays only chromatic colors with low saturation.

[0039] The hue of the color of the first display portion 11 is within the range of 7.5YR to 10YR and 1.0Y to less than 5.0Y in the Munsell color system (hereinafter, specific color range). The brightness of the color of the first display portion 11 is within the range of 3.0 to less than 9.0. In one example, the brightness of the color of the first display portion 11 is within the range of 3.0 to 5.0, or 6.0 to less than 9.0.

[0040] [Second display] The lightness of the color of the second display portion 12 is within a range of 3.0 or more and less than 9.0. In one example, the lightness of the color of the second display portion 12 is within a range of 3.0 or more and 5.0 or less, or within a range of 6.0 or more and less than 9.0.

[0041] [group] Each of the multiple first display units 11 and the multiple second display units 12 belongs to one of multiple groups GR divided by brightness. The difference in brightness between the first display units 11 and the second display units 12 belonging to a group GR and the first display units 11 and the second display units 12 belonging to another group GR is 1 or more for all combinations. Therefore, in the exterior material coordination tool 10, when two different groups GR are selected and one color is selected from each of the two groups GR, the brightness difference between the two selected colors is 1 or more.

[0042] Each color in the first lineup shown in the exterior material coordination tool 10 is in the same hue. Therefore, if one simply selects colors based on preference, there is a risk that two indistinguishable, similar colors will be selected. If two indistinguishable, similar colors are selected, there is a risk that the distinctive appearance of the two-colored building 1 will be diminished. For this reason, a tool in which each display section is grouped so that colors with a brightness difference of 1 or more can be selected is useful when selecting multiple colors.

[0043] [Analysis of landscape and architectural colors in Japan] The color range of the first display section 11 and the color range of the second display section 12 shown above are supported by a color analysis of buildings 1 and landscapes (hereinafter, selected buildings and selected landscapes) selected in Japan. The selected buildings and selected landscapes include buildings 1 and landscapes in "Important Preservation Districts for Groups of Traditional Buildings" selected by a designated organization in Japan, and landscapes of "Important Cultural Landscapes" selected by a designated organization in Japan. Images of the selected buildings and selected landscapes are used for the color analysis of the selected buildings and selected landscapes. Examples of color analysis include an analysis of the appearance rate of each color in the Munsell table or the HUE&TONE system, and an analysis of the appearance rate of each tone in an image. The HUE&TONE system is a color analysis system developed by Japan Color Design Laboratory Co., Ltd. (abbreviated as "NCD", hereinafter referred to as "NCD").

[0044] An example of an analysis of the occurrence rate of each color in an image will be described with reference to FIG. 2 and FIG. 3. In one example, in color analysis, a color is specified for each pixel in an image of a building 1 or a landscape. The color of each pixel is specified as one of the 1093 colors of the HUE&TONE system. Specifically, the color of each pixel is determined as follows. A color closest to the color is selected from the 1093 colors of the HUE&TONE system. The selected color is then specified as the color of the pixel. In this way, the image is analyzed by the 1093 colors. Then, the frequency of each color in the image is calculated. The frequency of a color is defined as the number of pixels that display the color. The occurrence rate of a color is defined as (color frequency) / total number of pixels in the image. The color analysis thus statistically processed is visualized by a tone diagram (see FIG. 2) or an image scale (see FIG. 3). The tone diagram refers to the tone diagram of the HUE&TONE system of NCD. The image scale is a color image analysis system developed by NCD.

[0045] With reference to FIG. 2, an example of an analysis of the occurrence rate of each tone in an image will be described. A tone is also called a color tone. The tone diagram has 12 tones. The 1093 colors of the HUE&TONE system belong to one of the tones. Therefore, for an image color-analyzed based on the HUE&TONE system, the color of each pixel can be reclassified into one of the 12 tones. For each tone in the tone diagram, the occurrence rate of the tone in the image is shown. According to the tone diagram, it is possible to recognize at a glance what tone the building 1 and the landscape have, or which tone is the most frequent.

[0046] With reference to FIG. 3, an example of the analysis of the appearance rate of each color in the image scale will be described. The image scale has a coordinate system that associates colors with the image people have of the colors. In the image scale, the colors with a warmer image are arranged toward the left side, the colors with a colder image are arranged toward the right side, the colors with a softer image are arranged toward the top side, and the colors with a harder image are arranged toward the bottom side. Specifically, a color in the HUE&TONE system is previously associated with each point in the coordinate system of the image scale. Therefore, for an image color-analyzed based on the HUE&TONE system, the color of each pixel can be arranged on the image scale. The appearance rate of each color is known in the image scale. Then, it is easy to grasp the position of a color with a high appearance rate in the image scale. The image of the scenery or building in the image can be objectively grasped from the position of the color with a high appearance rate in the image scale. Also, the difference in the image between multiple images can be objectively analyzed. Note that the appearance rate of a certain color in an image is defined as the number of pixels of the color x 100 / total number of pixels in the image.

[0047] In the image scale, the frequency of each color in the image is indicated by the size of the circle. For example, if the image contains many warm-image colors, a large circle is displayed in the left area. If the image contains many cool-image colors, a large circle is displayed in the right area. With such an image scale, it is possible to recognize at a glance what kinds of image colors are contained in the building 1 and the scenery.

[0048] A large number of images are used in the color analysis of the selected building and the selected scenery. Analysis of the large number of images of the selected building and the selected scenery has revealed that the color of the first display section 11 and the color of the second display section 12 appear frequently in the selected building and the selected scenery. Therefore, by using colors within the color range of the first display section 11 and the color range of the second display section 12 for the exterior material 7 of the building 1, a universal design that does not tire of the design can be formed.

[0049] The operation of this embodiment will now be described. The exterior material coordination tool 10 has a plurality of first display sections 11 constituting a first lineup of chromatic colors, and a plurality of second display sections 12 constituting a second lineup of achromatic colors. Achromatic colors include chromatic colors with a saturation of less than 0.8. The saturation of the color of the first display section 11 is in the range of 0.8 or more and less than 3.5. Thus, the colors shown by the first display section 11 and the second display section 12 are achromatic or low saturation.

[0050] Achromatic colors appear frequently in the selected buildings and landscapes. For example, examples of achromatic structures include black-walled buildings 1, white-walled buildings 1, gray roof tiles, white plastered walls, black-painted wooden walls, and retaining walls or stone walls made of achromatic stone materials such as limestone. Achromatic colors accentuate the colors of the surroundings, are not obtrusive, and do not tire of the eye. Achromatic colors also accentuate the plants throughout the year, harmonizing with the colors of the plants, which change with the seasons. Achromatic colors are colors that have been used in buildings 1 throughout the ages, and are not affected by trends.

[0051] Low saturation colors appear frequently in the selected buildings and the selected scenery. For example, examples of structures with low saturation colors include buildings 1 made of earthen walls, wooden buildings 1, blue tiles, and retaining walls or stone walls made of low saturation colored stones such as granite. Low saturation colors accentuate the surrounding colors, are not eyesores, and do not become boring or tiring to look at. In addition, low saturation colors accentuate the plantings throughout the year, as opposed to the colors of the plants that change with the seasons, and harmonize with the colors of the plants. In addition, low saturation colors are not conspicuous, so they are unlikely to become eyesores due to changes in the times or trends. For this reason, a building 1 with a low saturation color will blend in with the surroundings of the building 1 even if the building 1 adjacent to the building 1 is rebuilt or the plants around the building 1 are replanted, and the harmony of the overall scenery including the building 1 and its surroundings is unlikely to be disrupted. Furthermore, unlike achromatic colors, low saturation colors impart a color. The color variation increases depending on the color.

[0052] In this way, achromatic colors and low-saturation chromatic colors blend in with the Japanese landscape and are unlikely to look out of place or outdated even if fashions change with the times. By providing the exterior material coordination tool 10 with a first lineup of chromatic colors and a second lineup of achromatic colors, customers or designers have a wide range of options. In this way, it is possible to propose colors for the exterior material 7 that are suitable for long-term use of the building 1.

[0053] The effects of this embodiment will be described. (1) The exterior material coordination tool 10 has a plurality of first display sections 11 constituting a first lineup of chromatic colors and a plurality of second display sections 12 constituting a second lineup of achromatic colors. The achromatic colors include chromatic colors with a saturation of less than 0.8. The saturation of the colors in the first display sections 11 is within a range of 0.8 or more and less than 3.5.

[0054] According to this configuration, the colors displayed by the first display section 11 and the second display section 12 in the exterior material coordination tool 10 are achromatic colors or low chroma chromatic colors. Achromatic colors and low chroma chromatic colors are commonly seen in natural objects such as wood and stone, so they blend in with the Japanese landscape and are unlikely to feel out of place or outdated even if trends change with the times. In this way, colors for the exterior material 7 suitable for long-term use of the building 1 can be proposed.

[0055] (2) The saturation of the color of the first display section 11 is within the range of 1.0 or more and less than 1.5. According to this configuration, since the saturation of the first display section 11 is less than 1.5, the color of the first display section 11 brings out the natural colors around the building 1, such as the green of plants and the red or yellow of autumn leaves (hereinafter, the natural colors around the building). The natural colors around the building are colors that always exist regardless of changes in the times. The color of the above-mentioned first display section 11 can bring out the natural colors around the building. In this way, it is possible to propose colors for the exterior material 7 that are suitable for long-term use of the building 1.

[0056] In addition, the second display section 12 is an achromatic color. The achromatic color makes the natural color surrounding the building stand out. The exterior material coordination tool 10 including the first display section 11 of a low saturation color and the second display section 12 of an achromatic color can suggest a color of the exterior material 7 suitable for long-term use of the building 1 from among chromatic and achromatic colors.

[0057] (3) The saturation of the color of the first display section 11 is within the range of 1.0 or more and less than 1.5. Furthermore, the hue of the color of the first display section 11 may be within the range of 7.5YR or more and 10YR or less and 1.0Y or more and less than 5.0Y in the Munsell color system. The color of the first display section 11 configured in this way is a color that makes the natural color around the building stand out, and is a color that harmonizes with the color used in the exterior material 7 of the building 1 that has remained in Japan for many years. It can be said that the color of the building 1 that has remained in Japan for many years is a universal color that blends in with the Japanese landscape. For this reason, it is possible to propose a color of the exterior material 7 that is suitable for long-term use of the building 1.

[0058] (4) The lightness of the color of the first display portion 11 and the lightness of the color of the second display portion 12 are within the range of 3.0 or more and less than 9.0. Natural colors such as mountains, rivers, valleys, and oceans contain almost no colors with a brightness lower than 3.0 during the day. Moreover, natural colors such as mountains, rivers, valleys, and oceans contain almost no colors with a brightness higher than 9.0 during the day. Since the brightness of the color of the first display section 11 and the color of the second display section 12 are equal to or greater than 3.0 and less than 9.0, when the color of the first display section 11 and the color of the second display section 12 are adopted for the exterior material 7 of the building 1, the color of the first display section 11 and the color of the second display section 12 are unlikely to cause discord with the natural color. In this way, it is possible to propose colors for the exterior material 7 that are suitable for long-term use of the building 1.

[0059] (5) The lightness of the color of the first display portion 11 and the lightness of the color of the second display portion 12 are in the range of 3.0 or more and 5.0 or less, or in the range of 6.0 or more and less than 9.0. In many buildings 1, plants are arranged around the building 1. Also, the building 1 is built in a place where plants such as trees in the mountains, crops in the fields, roadside trees, and plants in the parks can be seen. The typical value of the brightness of the plants (plants and plants around the building 1) is generally greater than 5.0 and less than 6.0 throughout the four seasons. When the brightness of the building 1 and the brightness of the plants overlap, even if the hue of the building 1 and the hue of the plants are different, the building 1 and the plants may have the same color tone, and the overall appearance of the building 1 and the plants may be monotonous. In this regard, according to the above configuration, the brightness of the first display unit 11 and the brightness of the second display unit 12 are different from the brightness of the plants, so that when plants are arranged around the building 1, it is possible to propose an appropriate color that does not make the overall appearance of the building 1 and the plants not monotonous.

[0060] (6) Each of the multiple first display units 11 and the multiple second display units 12 belongs to one of multiple groups GR divided by brightness. The difference (brightness difference) between the brightness of the first display unit 11 and the second display unit 12 belonging to a certain group GR and the brightness of the first display unit 11 and the second display unit 12 belonging to another group GR is 1 or more for all combinations. Specifically, when a certain group GR is selected, the brightness of all elements (first display unit 11 and second display unit 12) in that group GR has a difference of 1 or more from the brightness of the elements of all other groups GR.

[0061] According to this configuration, when selecting two colors from the exterior material coordination tool 10, the two colors can be easily selected so that the brightness difference is 1 or more. For example, when planning a residential area consisting of multiple buildings 1, or when using two colors for the exterior of one building 1, two colors that clearly show the difference between the two colors can be easily selected. Specifically, by selecting one color each from two different groups GR, the brightness difference between the two colors will be 1 or more. In this way, two colors can be easily selected.

[0062] In order to clearly show the color difference between two adjacent buildings 1, it is preferable that the brightness difference between the colors of the two adjacent buildings 1 is 1.5 or more. Similarly, when two colors are used in one building 1, in order to clearly show the difference between the two colors in that building 1, it is preferable that the brightness difference between the two colors is 1.5 or more. In this way, even when selecting a color with a brightness difference of 1.5 or more, according to the configuration of (6) above, it is possible to easily select a color with a brightness difference of 1.5 or more. For example, when the group GR including the first candidate color has a brightness difference of 1.0 between that group GR and an adjacent group GR, the color of the adjacent group GR is not selected, and a color of a group GR other than the adjacent group GR is selected. In this way, when the first candidate color is determined, it is possible to easily select a color with a brightness difference of 1.5 or more from the first candidate color.

[0063] In addition, the difference (brightness difference) between the brightness of the first display unit 11 and the second display unit 12 belonging to a certain group GR and the brightness of the first display unit 11 and the second display unit 12 belonging to another group GR may be 1.5 or more for all combinations.

[0064] (7) The first display unit 11 and the second display unit 12 are provided on the base board 20. With this configuration, the exterior material coordinating tool 10 can be held in the hand. This makes the exterior material coordinating tool 10 easy to carry.

[0065] <Second embodiment> A method for selecting a color for the exterior material 7 of the building 1 will be described with reference to Figures 4 to 6. In this embodiment, a method for selecting a color for the exterior material 7 of the building 1 using the above-mentioned exterior material coordination tool 10 will be described. The method for selecting a color for the exterior material 7 of the building 1 is used in consultation between a designer and a client.

[0066] As shown in FIG. 4, the method for selecting the color of the exterior material 7 includes a first step S11 and a second step S12.

[0067] In a first step S11, the designer sets the color of the area in which the building 1 is to be constructed as a base color. The base color is the color that is set first in the design of the building 1, or the color that is least likely to be changed during the design. In the first step S11, the color of the area is set as such a base color.

[0068] The color of a region is the color of a building material produced in the region, or the color of a building material used in a building 1 that is a landmark of the region. Examples of building materials produced in the region include stone. For example, Kugurizaka stone from Aomori Prefecture, Towada stone from Akita Prefecture, Oga stone from Akita Prefecture, Iuchi stone from Miyagi Prefecture, Shirakawa stone from Fukushima Prefecture, Ashino stone from Tochigi Prefecture, Oya stone from Tochigi Prefecture, Nakanojo stone from Gunma Prefecture, Suwa Teppei stone from Nagano Prefecture, Saku Teppei stone from Nagano Prefecture, Mino stone from Gifu Prefecture, granite from Hyogo Prefecture, Isahaya stone from Nagasaki Prefecture, Sakurajima lava stone from Kagoshima, Ryukyu limestone from Okinawa Prefecture, etc. are listed.

[0069] An example of Building 1 that is a local landmark is a brick warehouse in Otaru, Hokkaido. In this case, the building material used for Building 1 is brick.

[0070] In a second step S12, the designer selects a color from the first lineup or the second lineup that has a brightness difference of 1.5 or more from the base color as the color of the exterior material 7. The designer may propose the selected color to the client.

[0071] With reference to Figs. 5 and 6, an example of building a building 1 in a region that is a stone producing area or was famous in the past as a stone producing area will be described.

[0072] As shown in FIG. 5, in the first step S11, at the request of the customer, it is set that Suwa Teppei stone will be used for the gate wall 2 and the wall 3. Furthermore, the color of the Suwa Teppei stone to be used is determined from a photo sample. Then, the color of the selected Suwa Teppei stone is specified. For example, the color is specified by comparing with a color sample. The specified color is set as the base color for the building 1.

[0073] In a second step S12, the color of the exterior material 7 of the exterior wall 6 of the building 1 is proposed by the designer using an exterior material coordination tool 10 for the exterior wall material of the building 1.

[0074] Specifically, as shown in FIG. 6, the position of the base color is shown in the exterior material coordination tool 10. Then, the designer recommends a range of colors with a brightness difference of 1.5 or more. For example, if the color of Suwa Teppei stone is an achromatic gray close to black with a hue of 10Y, brightness of 4.0, and saturation of 0.4, a color with a brightness range of 5.5 or more is recommended as the color of the exterior material 7. The designer and the client decide on the color of the exterior material 7 from within the recommended color range.

[0075] In this example, the following effects are achieved: Locally produced stone is widely used in the area. By using stone from the area where the building 1 is to be built, the building 1 easily blends in with the scenery of the area. In addition, the color of the exterior material 7 is selected from colors (the colors of the first lineup and the colors of the second lineup) that have been selected in advance as colors suitable for long-term use of the building 1, so that the building 1 as a whole blends in with the scenery of the area. Furthermore, due to the color selection in the second step S12, the brightness of the color of the exterior material 7 differs from the brightness of the base color by at least 1.5 or more. This makes the difference between the base color and the color of the exterior material 7 clear to the naked eye, resulting in a design that does not give a monotonous impression to the building 1 as a whole.

[0076] Therefore, according to the above-described method for selecting the color of the exterior material 7, when a color specific to the area in which the building 1 is to be constructed is adopted for the building 1, a color can be selected that does not overshadow the local color and is suitable for long-term use of the building 1.

[0077] <Third embodiment> 7 to 9, another example of the method for selecting the color of the exterior material 7 of a building will be described. In this embodiment, as in the second embodiment, the color of the exterior material 7 of the building 1 is selected using the exterior material coordination tool 10 described above.

[0078] 7, the method for selecting a color of the exterior material 7 includes a first step S21 and a second step S22. In the first step S21, the designer sets a greenery view factor in an exterior perspective drawing of the building 1.

[0079] As shown in Figure 8, the green view ratio is defined as the ratio of the planting area GA in the exterior perspective drawing. The shape of the frame 30 of the exterior perspective drawing is rectangular. The size of the frame 30 of the exterior perspective drawing is such that, when viewed from the front of the building 1, the building 1 and all the plantings within the building 1 site are contained therein without excess or deficiency. The green view ratio can be expressed by the following formula: Green view ratio = 100 × area of ​​planting area GA / area of ​​the exterior perspective drawing.

[0080] In a second step S22, a color of the exterior material 7 is selected from the first lineup or the second lineup based on the green view factor with reference to the color selection chart 13. The designer may propose the selected color to the client.

[0081] The color selection chart 13 is a chart in which the lightness of a color increases as the green visibility rate decreases. The color selection chart 13 shows the recommended lightness of the color of the exterior wall of the building 1 with respect to the green visibility rate in the exterior perspective drawing of the building 1.

[0082] FIG. 9 shows an example of the color selection chart 13. In this example, the horizontal axis indicates the green view factor. The vertical axis indicates the color brightness. The range indicated by diagonal lines in the color selection chart 13 is the recommended brightness range. The color selection chart 13 is created based on the fact that the planting increases the brightness of the entire building 1, and that there is an appropriate range for the brightness of the entire building 1. Specifically, if the brightness of the entire building 1 becomes too high, the building 1 becomes more noticeable than the background color when viewed from outside, and it becomes difficult for the building 1 to harmonize with the background. Also, if the brightness of the entire building 1 becomes too low, the building 1 becomes blackish overall, and the building 1 gives a dark impression. In this way, there is an appropriate range for the brightness of the entire building 1. Since the brightness of the planting is around 5, a high green view factor has the effect of increasing the brightness of the entire building 1. From the above, the color selection chart 13 is associated such that the brightness of the recommended color increases as the green view factor decreases.

[0083] As described above, according to the method for selecting the color of the exterior material 7 of this example, the color of the exterior material 7 of the building 1 can be selected based on the green view factor. Specifically, since the color selection chart 13 in which the green view factor and the recommended brightness are associated can be used, a color of appropriate brightness according to the green view factor can be selected. Therefore, the brightness of the entire building 1 can be kept within an appropriate range.

[0084] <Fourth embodiment> 10 to 12, another example of the method for selecting the color of the exterior material 7 of the building 1 will be described. In this embodiment, as in the second embodiment, the exterior material coordination tool 10 is used to select the color of the exterior material 7 of the building 1.

[0085] As shown in FIG. 10, the method for selecting the color of the exterior material 7 includes a first step S31 and a second step S32.

[0086] In a first step S31, the orientation of the facade of the building 1 is set. In many buildings 1, the facade is an elevation facing the road in the building 1. For example, the facade is configured as an elevation including the main entrance.

[0087] In a second step S32, based on the orientation of the facade, the color of the exterior material 7 is selected from the first lineup or the second lineup by referring to the color selection table 14. The designer may propose the selected color to the client.

[0088] The color selection table 14 will be described with reference to Fig. 11. The color selection table 14 associates the orientation of the facade of the building 1 with a color recommended as the color of the exterior wall 6 that constitutes the facade.

[0089] Specifically, in the color selection table 14, the orientation of the facade is associated with each lineup. An east-facing facade is associated with the second lineup. A south-facing facade is associated with the first lineup and the second lineup. A west-facing facade is associated with the first lineup. A north-facing facade is associated with the first lineup and the second lineup.

[0090] The time of day when building 1 looks beautiful varies depending on the orientation of the façade. For example, in the case of a façade facing east, building 1 stands out against the scenery in the morning when the sunlight is strong. Also, morning light contains more blue light than evening light. Achromatic colors look good in bluish light. For this reason, the second lineup is associated with façades facing east. This allows building 1 to look even more beautiful during the time of day when it is most visible.

[0091] In the case of a west-facing façade, Building 1 stands out in the scenery in the evening when the sunlight is strong. Also, evening light has more red light than morning light. Chromatic colors stand out well in reddish light. For this reason, the first lineup is assigned to west-facing façades. This allows Building 1 to look even more beautiful during the hours when it is most visible.

[0092] For a south-facing façade, Building 1 stands out in the landscape at noon when the sun is shining brightly. The light during the day is stronger than in the morning and evening. Therefore, the first and second lineups are assigned to the south-facing façade. For a north-facing façade, the façade is in shade during the day, so there is no time of day when it stands out. Therefore, the first and second lineups are assigned to the north-facing façade.

[0093] In this way, according to the method for selecting the color of the exterior material 7, it is possible to propose a color that will make the building 1 look beautiful during the hours when the building 1 is exposed to sunlight.

[0094] [Example of two-tone use] If the facade of building 1 is set to face north and two colors are used for the north-facing facade, two colors may be selected from the first lineup and the second lineup so that the brightness difference between them is 2.0 or more.

[0095] For example, as shown in Fig. 12, in a building 1, the color of a first exterior wall 6A on the first and second floors is set to a first color. In the building 1, the color of a second exterior wall 6B extending from the first floor to the balcony on the second floor is set to a second color. In this case, the brightness difference between the first color and the second color is set to 2.0 or more.

[0096] In the case of a north-facing facade, the facade is in shade during the day, so if two colors are used on the north-facing facade, the difference between the two colors becomes difficult to see. In this regard, the above configuration makes it possible to propose two colors that clearly show the difference in color on the north-facing facade.

[0097] <Fifth embodiment> With reference to FIG. 13, another example of a method for selecting the color of the exterior material 7 of a building 1 will be described. In this embodiment, a method for selecting a color when deciding the color of each building 1 in a design of a row of houses including a plurality of buildings 1 will be described. For example, as an example of a design of a row of houses including a plurality of buildings 1, a residential area of ​​condominiums may be designed. In such a case, if adjacent buildings 1 have colors with similar brightness, the residential area will have a monotonous image. Therefore, using an exterior material coordination tool 10, the colors of the exterior material 7 of each building 1 are set so that the colors of the exterior materials 7 of adjacent colors differ by 1.5 or more in brightness.

[0098] For example, as shown in Fig. 13, the brightness of the color of the exterior wall 6 of a certain building 1 is set to a color that is 1.5 or more away from the brightness of the color of the exterior wall 6 of the adjacent building 1 to the left, and is also set to a color that is 1.5 or more away from the brightness of the color of the exterior wall 6 of the adjacent building 1 to the right. This color selection is applied to all buildings 1 lined up in a row. By selecting colors in this way, it is possible to create a townscape that is both varied and calm.

[0099] This color selection method can be applied when building a new house (building 1) in an existing residential area, and also when renovating a house (building 1) in an existing residential area.

[0100] <Modification> The above-described embodiments are examples of possible forms that the exterior material coordination tool 10 and the method for selecting a color for the exterior material 7 of the building 1 can take, and are not intended to limit the forms. The exterior material coordination tool 10 and the method for selecting a color for the exterior material 7 of the building 1 can take forms that are different from those exemplified in the above-described embodiments. Examples of such forms include forms in which part of the configuration of the embodiments is replaced, changed, or omitted, or forms in which new configuration is added to the embodiments. Modified examples of the embodiments are shown below.

[0101] (1) In the above embodiment, the first display unit 11 and the second display unit 12 are provided on the base board 20, but the form of the first display unit 11 and the second display unit 12 is not limited to this. For example, the first display unit 11 and the second display unit 12 of the exterior material coordination tool 10 may be displayed on a display screen of an electronic device. The electronic device includes an electronic device having a display screen or an electronic device capable of projecting a display screen. Examples of the electronic device include a tablet, a personal computer, a smartphone, and a projector. According to this configuration, the first display unit 11 and the second display unit 12 are less susceptible to color deterioration due to ultraviolet rays than when the first display unit 11 and the second display unit 12 are printed. The electronic device may have image software having an image enlargement function. In this case, the first display unit 11 or the second display unit 12 can be enlarged and displayed using the image software.

[0102] (2) In the second embodiment, three examples are given for the method of selecting the color of the exterior material 7 of the building 1, but any two of these three examples may be combined, or all three examples may be combined.

[0103] For example, the color of the area in which building 1 is to be built may be set as the base color, and the color of exterior material 7 of exterior wall 6 may be selected based on the base color, the greenery view rate, and the orientation of the facade of building 1.

[0104] If there is no color for the area in which the building 1 is to be built, the base color may not be set, and the color of the exterior material 7 of the exterior wall 6 may be selected based on the greenery view factor and the direction of the facade of the building 1.

[0105] In the case of a building 1 without any vegetation, the color of the area in which the building 1 is to be constructed may be set as the base color, and the color of the exterior material 7 of the exterior wall 6 may be selected based on the base color and the orientation of the facade of the building 1.

[0106] When it is difficult to identify the main surface of the building 1, the color of the area in which the building 1 is to be built may be set as the base color, and the color of the exterior material 7 may be selected based on the base color and the green view factor. An example of a case in which it is difficult to identify the main surface of the building 1 is when the building 1 is located on a corner lot and both the front and side are visible to the public.

[0107] (3) This technology can also be applied to buildings in foreign countries. Specifically, the technology of the exterior material coordination tool, which is an exterior material coordination tool for selecting the color of the exterior material of a building and has a plurality of first display sections constituting a first lineup of chromatic colors and a plurality of second display sections constituting a second lineup of achromatic colors, and which includes any one of Supplementary Notes 4 to 10 below, can also be applied to buildings in foreign countries. The hue and saturation values ​​of the first display section are set according to the region of the world. In addition, the technology related to the facade described in Supplementary Notes 11 and 12 is arranged according to the region of the world.

[0108] This specification discloses the following techniques. [Appendix 1] An exterior material coordination tool for selecting colors for exterior materials of a building, the exterior material coordination tool having a plurality of first display sections constituting a first lineup of chromatic colors and a plurality of second display sections constituting a second lineup of achromatic colors, the plurality of first display sections display colors different from one another, the plurality of second display sections display colors different from one another, the achromatic colors include chromatic colors having a saturation of less than 0.8, and the saturation of the colors of the first display sections is within a range of 0.8 or more and less than 3.5.

[0109] [Appendix 2] 2. The exterior material coordination tool according to claim 1, wherein the color saturation of the first display portion is within a range of 1.0 or more and less than 1.5.

[0110] [Appendix 3] 3. An exterior material coordination tool according to claim 2, wherein the hue of the color of the first display portion is within a range of 7.5YR or more and 10YR or less, and 1.0Y or more and less than 5.0Y, in the Munsell color system.

[0111] [Appendix 4] The exterior material coordination tool according to claim 3, wherein the color brightness of the first display portion and the color brightness of the second display portion are within a range of 3.0 or more and less than 9.0.

[0112] [Appendix 5] The exterior material coordination tool described in Appendix 4, wherein the color brightness of the first display portion and the color brightness of the second display portion are in the range of 3.0 or more and 5.0 or less, or in the range of 6.0 or more and less than 9.0.

[0113] [Appendix 6] The exterior material coordination tool described in Appendix 5, wherein each of the plurality of first display units and the plurality of second display units belongs to one of a plurality of groups divided by brightness, and a difference between the brightness of the first display units and the second display units belonging to one of the groups and the brightness of the first display units and the second display units belonging to the other groups is 1 or more for all combinations.

[0114] [Appendix 7] The first display unit and the second display unit are provided on a base board. Exterior material coordination tool described in Appendix 6.

[0115] [Appendix 8] 7. The exterior material coordination tool according to claim 6, wherein the first display section and the second display section are displayed on a display screen of an electronic device.

[0116] [Appendix 9] A method for selecting a color of an exterior material of a building using an exterior material coordination tool according to any one of appendices 1 to 8, comprising: a first step of setting the color of the area in which the building is to be constructed as a base color; and a second step of selecting a color from the first lineup or the second lineup, the color having a brightness difference of 1.5 or more from the base color, as the color of the exterior material, wherein the color of the area is the color of a building material produced in the area, or the color of a building material used in a building that is a landmark of the area.

[0117] [Appendix 10] A method for selecting a color for an exterior material of a building using an exterior material coordination tool according to any one of appendices 1 to 8, comprising: a first step of setting a green view factor in an exterior perspective image of the building; and a second step of selecting a color for the exterior material from the first lineup or the second lineup by referring to a color selection chart based on the green view factor, wherein the color selection chart is a chart related to the color such that the lightness of the color increases as the green view factor decreases.

[0118] [Appendix 11] A method for selecting a color of an exterior material of a building using an exterior material coordination tool according to any one of appendices 1 to 8, comprising: a first step of setting an orientation of the facade of the building; and a second step of selecting a color of the exterior material from the first lineup or the second lineup by referring to a color selection table based on the orientation of the facade, wherein in the color selection table, an east-facing facade is associated with the second lineup, a south-facing facade is associated with the first lineup and the second lineup, a west-facing facade is associated with the first lineup, and a north-facing facade is associated with the first lineup and the second lineup.

[0119] [Appendix 12] A method for selecting a color for an exterior material as described in Appendix 11, wherein, in the first step, when the orientation of the facade of the building is set to face north and two colors are adopted for the north-facing facade, in the second step, two colors are selected from the first lineup and the second lineup so that the brightness difference is 2.0 or more. [Explanation of symbols]

[0120] GA...planting area, 1...building, 6...exterior wall, 7...exterior material, 10...exterior material coordination tool, 11...first display section, 12...second display section, 13...color selection chart, 14...color selection table, 20...baseboard.

Claims

1. An exterior material coordination tool for selecting the color of an exterior material for a building, A plurality of first display sections constituting a first lineup of chromatic colors and a plurality of second display sections constituting a second lineup of achromatic colors, the first display units display different colors from one another, the second display portions display colors different from one another, The achromatic color includes a chromatic color having a saturation of less than 0.8, The color saturation of the first display portion is within a range of 1.0 or more and less than 1.

5. Exterior material coordination tool.

2. the hue of the color of the first indication portion is within a range of 7.5YR or more and 10YR or less and 1.0Y or more and less than 5.0Y in the Munsell color system; The exterior material coordination tool according to claim 1 .

3. the lightness of the color of the first display portion and the lightness of the color of the second display portion are within a range of 3.0 or more and less than 9.0; The exterior material coordination tool according to claim 2 .

4. the lightness of the color of the first display portion and the lightness of the color of the second display portion are in a range of 3.0 or more and 5.0 or less, or in a range of 6.0 or more and less than 9.0; The exterior material coordination tool according to claim 3 .

5. each of the first display units and the second display units belongs to one of a plurality of groups divided by brightness; a difference between the brightness of the first display unit and the brightness of the second display unit belonging to the group and the brightness of the first display unit and the brightness of the second display unit belonging to another group is 1 or more for all combinations. The exterior material coordination tool according to claim 4.

6. The first display unit and the second display unit are provided on a base board. The exterior material coordination tool according to claim 5 .

7. the first display unit and the second display unit are displayed on a display screen of an electronic device; The exterior material coordination tool according to claim 5 .

8. A method for selecting a color of an exterior material of a building using the exterior material coordination tool according to any one of claims 1 to 7, comprising: A first step of setting a color of an area in which the building is to be constructed as a base color; and a second step of selecting, as the color of the exterior material, a color from the first lineup or the second lineup that has a lightness difference from the base color of 1.5 or more, The color of the region is the color of building materials produced in the region, or the color of building materials used in buildings that are landmarks of the region. How to choose exterior material colors.

9. A method for selecting a color of an exterior material of a building using the exterior material coordination tool according to any one of claims 1 to 7, comprising: A first step of setting a green view ratio in an exterior perspective image of the building; A second step of selecting a color of the exterior material from the first lineup or the second lineup by referring to a color selection chart based on the green view factor; The color selection chart is a chart in which the lightness of the color is increased as the green viewing ratio is decreased. How to choose exterior material colors.

10. A method for selecting a color of an exterior material of a building using the exterior material coordination tool according to any one of claims 1 to 7, comprising: a first step of setting the orientation of the building facade; A second step of selecting a color of the exterior material from the first lineup or the second lineup by referring to a color selection table based on the orientation of the facade, In the color selection table, The east-facing facade is associated with the second lineup; The first lineup and the second lineup are associated with a south-facing facade; The west-facing facade is associated with the first lineup; The first lineup and the second lineup are associated with a north-facing facade. How to choose exterior material colors.

11. In the first step, when the orientation of the facade of the building is set to face north and two colors are adopted for the north-facing facade, In the second step, two colors are selected from the first lineup and the second lineup such that a brightness difference between the two colors is 2.0 or more. The method for selecting a color of an exterior material according to claim 10.

12. A method for selecting a color for an exterior material of a building using an exterior material coordination tool, comprising: The exterior material coordination tool is an exterior material coordination tool for selecting a color of an exterior material of the building, A plurality of first display sections constituting a first lineup of chromatic colors and a plurality of second display sections constituting a second lineup of achromatic colors, the first display units display different colors from one another, the second display portions display colors different from one another, The achromatic color includes a chromatic color having a saturation of less than 0.8, the color saturation of the first display portion is within a range of 0.8 or more and less than 3.5; The method comprises: A first step of setting a color of an area in which the building is to be constructed as a base color; and a second step of selecting, as the color of the exterior material, a color from the first lineup or the second lineup that has a lightness difference from the base color of 1.5 or more, The color of the region is the color of building materials produced in the region, or the color of building materials used in buildings that are landmarks of the region. How to choose exterior material colors.

13. A method for selecting a color for an exterior material of a building using an exterior material coordination tool, comprising: The exterior material coordination tool is an exterior material coordination tool for selecting a color of an exterior material of the building, A plurality of first display sections constituting a first lineup of chromatic colors and a plurality of second display sections constituting a second lineup of achromatic colors, the first display units display different colors from one another, the second display portions display colors different from one another, The achromatic color includes a chromatic color having a saturation of less than 0.8, the color saturation of the first display portion is within a range of 0.8 or more and less than 3.5; The method comprises: A first step of setting a green view ratio in an exterior perspective image of the building; A second step of selecting a color of the exterior material from the first lineup or the second lineup by referring to a color selection chart based on the green view factor; The color selection chart is a chart in which the lightness of the color is increased as the green viewing ratio is decreased. How to choose exterior material colors.

14. A method for selecting a color for an exterior material of a building using an exterior material coordination tool, comprising: The exterior material coordination tool is an exterior material coordination tool for selecting a color of an exterior material of the building, A plurality of first display sections constituting a first lineup of chromatic colors and a plurality of second display sections constituting a second lineup of achromatic colors, the first display units display different colors from one another, the second display portions display colors different from one another, The achromatic color includes a chromatic color having a saturation of less than 0.8, the color saturation of the first display portion is within a range of 0.8 or more and less than 3.5; The method comprises: a first step of setting the orientation of the building facade; A second step of selecting a color of the exterior material from the first lineup or the second lineup by referring to a color selection table based on the orientation of the facade, In the color selection table, The east-facing facade is associated with the second lineup; The first lineup and the second lineup are associated with a south-facing facade; The west-facing facade is associated with the first lineup; The first lineup and the second lineup are associated with a north-facing facade. How to choose exterior material colors.

15. In the first step, when the orientation of the facade of the building is set to face north and two colors are adopted for the north-facing facade, In the second step, two colors are selected from the first lineup and the second lineup such that a brightness difference between the two colors is 2.0 or more. The method for selecting a color of an exterior material according to claim 14.

Images