If we study people's concept of color from an aesthetic point of view, we will find that all people (including the primitive people mentioned above) without exception maintain a concept of inherent color. The relatively constant hue exhibited by the light-receiving part under the illumination of the color light near noon. The concept of intrinsic color is not very scientific. According to physics, the different hues presented by objects are due to the action of sunlight, which is composed of six colors: red, orange, yellow, green, cyan, and purple. When light acts on an object image, it produces different absorption and reflection effects due to its different texture, and the reflected light color appears as the hue of the object image. For a long time, people have been accustomed to using this color under white light as the standard for identifying different hues, forming a universally consistent "concept of intrinsic color". Red flowers, green grass, blue sky, gray buildings, white milk, yellow lemons, purple lilacs, brown-red horses, khaki sand dunes, etc., are all based on the concept of intrinsic color. The colors of the objects are distinguished. This concept has firmly regulated people's vision since ancient times. In the education of infants, there is a special subject that recognizes the inherent color of objects. Therefore, people have cultivated a color vision habit since childhood, that is, they are good at eliminating the influence of light and color light as much as possible to distinguish the inherent color of the object image.

For example: When the orange glow of the setting sun dyes a white flock orange, people do not think it is a flock of orange, but still point out that the flock is white (intrinsic color). When night falls, the green of the green tree disappears, and the green of the green tree becomes almost black visually, but people still call it a green leaf tree instead of a black leaf tree. The gorgeous gray tree shadows are projected on the white wall, but people never think it is a gray and white flower wall. If it is under candlelight, when yellow and white objects both reflect yellow light and show the same yellow color, people warn: "You can't see color under the light". This shows how solid the concept of inherent color is in people's visual experience! Of course, the reason why this concept of inherent color is so strong, in addition to the long-term historical reasons, in fact it does reflect the reality of the objective world under certain conditions. Therefore, people's inherent color concept and color sense are not purely subjective, but a reflection of the objective true hue. It has been passed down from generation to generation since primitive society. For example: "two orioles sing the green willow, a line of egrets on the blue sky" is like a meticulous and heavy-color painting in a traditional Chinese painting. It reflects the conclusion of the inherent color observation method. "Yellow", "green", "white" and "blue" are exactly the descriptions of the inherent colors of "oriole", "willow", "heron" and "sky" under the white light on the front.

If we study people's concept of color from an aesthetic point of view, we will find that all people (including the primitive people mentioned above) without exception maintain a concept of inherent color. The relatively constant hue exhibited by the light-receiving part under the illumination of the color light near noon. The concept of intrinsic color is not very scientific. According to physics, the different hues presented by objects are due to the action of sunlight, which is composed of six colors: red, orange, yellow, green, cyan, and purple. When light acts on an object image, it produces different absorption and reflection effects due to its different texture, and the reflected light color appears as the hue of the object image. For a long time, people have been accustomed to using this color under white light as the standard for identifying different hues, forming a universally consistent "concept of intrinsic color". Red flowers, green grass, blue sky, gray buildings, white milk, yellow lemons, purple lilacs, brown-red horses, khaki sand dunes, etc., are all based on the concept of intrinsic color. The colors of the objects are distinguished. This concept has firmly regulated people's vision since ancient times. In the education of infants, there is a special subject that recognizes the inherent color of objects. Therefore, people have cultivated a color vision habit since childhood, that is, they are good at eliminating the influence of light and color light as much as possible to distinguish the inherent color of the object image.

For example: When the orange glow of the setting sun dyes a white flock orange, people do not think it is a flock of orange, but still point out that the flock is white (intrinsic color). When night falls, the green of the green tree disappears, and the green of the green tree becomes almost black visually, but people still call it a green leaf tree instead of a black leaf tree. The gorgeous gray tree shadows are projected on the white wall, but people never think it is a gray and white flower wall. If it is under candlelight, when yellow and white objects both reflect yellow light and show the same yellow color, people warn: "You can't see color under the light". This shows how solid the concept of inherent color is in people's visual experience! Of course, the reason why this concept of inherent color is so strong, in addition to the long-term historical reasons, in fact it does reflect the reality of the objective world under certain conditions. Therefore, people's inherent color concept and color sense are not purely subjective, but a reflection of the objective true hue. It has been passed down from generation to generation since primitive society. For example: "two orioles sing the green willow, a line of egrets on the blue sky" is like a meticulous and heavy-color painting in a traditional Chinese painting. It reflects the conclusion of the inherent color observation method. "Yellow", "green", "white" and "blue" are exactly the descriptions of the inherent colors of "oriole", "willow", "heron" and "sky" under the white light on the front.