What is contrast color
In order to understand better, the two colors on the hue circle that are between 120 degrees and 180 degrees apart are usually called contrast colors. The farther the distance, the greater the difference in hue and the stronger the contrast. The two distinct colors constitute a clear color difference. Only when there is contrast, there are strong and weak points. Contrast color matching must be relative, which is an important way to give color expressiveness.
As above, red and green have the strongest contrast at the farthest point; red and 120 degrees are the next, and so on, the closer to red, the weaker the contrast.
Red + green is the strongest, followed by red + yellow and green. Red + yellow is the contrast of the three primary colors. Red + medium yellow is the medium difference contrast. Red + orange is the adjacent color, not the contrast color.
Complementary color contrast
Complementary color: It is the combination of one three primary colors and the secondary colors of the other two primary colors, and the two colors are at 180 degrees on the hue circle. Without going into depth, we just need to understand that there are only three pairs of complementary colors, and the visual impact is very strong.
There are three pairs of complementary colors: red + green yellow + purple blue + orange
Complementary color contrast-red + green
Complementary color contrast-yellow + purple
Complementary color contrast-blue + orange