How did the color come from? How is it formed?

Color theory is a kind of perceptual difference between human eyes and different spectra of light. Generally speaking, red, orange, yellow, green, blue and purple correspond to different wavelength spectra. White light is a mixture of the above different spectra. In nature or through chemical synthesis, a structural substance has specific absorption or reflection characteristics for light. When a beam of white light is irradiated, due to this characteristic, the light reflected to the human eye only accepts part of the spectrum, thus forming the perception of color difference.

What kind of color difference will be caused depends on the chemical structure and physical state of the substance itself, which is essentially the shielding of light by a specific object.

Different colors consist of different colorants, and the colorants in pigments are generally called pigments.

Supplement: The difference between dyes and pigments is that dyes are usually colored by chemical bonding, while pigments are colored by physical attachment. Dyes are usually soluble in water, but pigments are insoluble in water.

Pigments are generally divided into inorganic pigments and organic pigments. As the name implies, inorganic pigments are inorganic chemical structures and organic pigments are organic chemical structures. Generally speaking, the amount of inorganic pigments is greater than that of organic pigments, such as metallic paints. Metal powder is generally used, which is also an inorganic pigment in nature, and many oxides extracted from natural minerals can also be used as pigments. Such as carbon black, zirconia, molybdate red, etc. (Some pigments for painting are made of these materials, usually inorganic oxides and other powders are made by adding grease and solvents), and basically all colors can be provided by inorganic pigments.

Organic pigments: basically, organic pigments of various colors can also be provided. Compared with inorganic pigments, organic pigments are much better in color application performance. It is a chemically synthesized organic powder, such as color ink, car color paint, home decoration color paint, etc. Mostly organic pigments. Organic pigments with different chemical structures show different optical properties due to different crystallization States, thus showing different colors visually.