An important feature of color is "color temperature", which is an instinctive reaction of people to color. The colors of orange, yellow and red are always associated with warmth and enthusiasm, so they are called warm colors. Warm colors give people a warm feeling: red, orange, yellow and their colors.
The higher the brightness of a cool tone-the warmer it is, the higher the brightness of a warm tone-the colder it is. Cold tones are green, blue and purple that give people a cold feeling, and the colors of cold tones have a contractive effect on vision.
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In color theory, warm colors are mixed with white, which reduces darkness. Cool colors mixed with black add a sense of darkness. Tones mixed with gray, or cold and warm colors. Mixing a color with any neutral color (including black, gray and white) can reduce the chromaticity or visual chromaticity while keeping the hue unchanged.
Tone does not refer to the nature of color, but the overall evaluation of a painting. Although a painting may use a variety of colors, in general there is a tone, which is blue or red, warm or cold, and so on. If the work does not have a uniform tone, it will appear chaotic. But if they are all inconsistent small color blocks, the overall effect also gives a unified tone.
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Baidu encyclopedia-cool tone