Basic knowledge of paint color and mixing

2022-07-22
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Hue depends on wavelength. Each wavelength produces a certain hue, but each hue is not related to a specific wavelength. Because the human eye is not a very fine sensory organ, light with the same spectral distribution can cause the same color feeling, while light with different distribution can also cause the same color feeling under certain conditions. For example, red light and green light are mixed in a certain proportion to get yellow light

color mixing

additive color mixing

hue depends on wavelength, and each wavelength produces a certain hue, but each hue is not related to a specific wavelength. Because the human eye is not a very fine sensory organ, light with the same spectral distribution can cause the same color feeling, while light with different distribution can also cause the same color feeling under certain conditions. For example, red light and green light are mixed in a certain proportion to get yellow light

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for each color light in the spectrum, you can find another color light mixed with it in a certain proportion to get white color light. This pair of color lights is called complementary color, such as red — Green and yellow — Blue, green — Purple

color light mixing is a kind of additive mixing. Red, green and blue are selected as the three primary colors (the selection principle is that any two kinds of mixing cannot produce the third):

red light + green light + blue light = white light

the energy of color light mixing is equal to the sum of the energy values of all colors, and the lightness is also increased

three laws of additive color mixing:

complementary color law: each color light has a color that is mixed with it, offset each other, or neutralized to produce white, such as red green, blue yellow, green purple

intermediate color law: when mixing every two non complementary colors, a new mixed color or intermediate color between the two is generated, and its saturation is generally low

substitution law: that is, the same color spectrum, color a= color B, color c= color D, a+c=b+d, which is also the basis of modern colorimetry. The above law is only suitable for the mixing of color and light. For example, the color of color TV is mixed by the color and light emitted by three electron guns, which is an additive color mixing

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