What do complementary colors in colors mean?

Complementary colors are divided into artistic complementary colors and optical complementary colors.

Definition of complementary colors in art: two colors with an included angle of180 in the color phase ring.

Definition of optical complementary color: two colors of light are mixed in an appropriate ratio to produce white light.

The complementary colors in optics are red and cyan (water blue), blue and orange, yellow-green and blue-purple, cyan and magenta. In optics, when two colors of light are mixed in a proper proportion to produce white light, the two colors are called "complementary colors".

The color circle in art is red, yellow and blue (RYB), so the complementary colors are slightly different: red and green complementary colors, blue and orange complementary colors, and Rayna Sue complementary colors. The juxtaposition of complementary colors will cause a strong color contrast, which will make the red one redder and the green one greener.

Extended data:

The human eye has three pairs of complementary colors. The three pairs of complementary colors are: blue yellow, red green, black and white. In each pair, two can't appear at the same time, two are complementary, and only one can prevail. The output signals of the three complementary mechanisms have different proportions, which makes people feel different. Hailin put forward this theory because it is supported by negative afterimage phenomenon.

For example, if you look at the red flowers for a long time and then at the white background, you will see the blue flowers. Look at the "ten" on the red flower for half a minute first. When you look at the white paper, blue flowers will appear faintly on the white paper. If the flowers are yellow, white paper will show blue flowers; If the flowers are deep red, the white paper will show the green flowers.

Red and green complement each other. Blue and orange complement each other. Purple and yellow are complementary. Complementary colors in colors will reduce color purity and turn gray. Generally, you don't need complementary colors when painting.