When the eyes see two adjacent colors at the same time, they will show different states in terms of optical composition and color intensity （Michel Eugene Chevreul, 1987）。 This principle covers all the possible ways that two or more colors can change their appearance when viewed together. For example, a dark color and a light color will appear darker when contrasted with a light color, and vice versa. A cool color surrounded by a cool color will appear warmer. When two colors look together, it appears to be a complementary color of the two colors mixed together. Saturated colors will add tones in adjacent light colors, complementary colors will strengthen each other.
Edited and Translated by Zhang Yifei
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