Scheme № 4: The split complementary combination
A variation on the complementary color combination. In this case, you take one primary color and two complementary ones (the colors that lie on both sides of the primary color’s antipode on the color circle). The effect created by such a scheme is just as contrasting as the one before but slightly less intense. If you feel unconfident about using the complementary scheme, use the split complementary instead.
Scheme № 5: The tetrad — a combination of four colors
This is a scheme that includes one primary and two complementary colors, plus an additional color that highlights the accents. An example: blue-green, blue-violet, orange-red, orange-yellow.
Scheme № 6: The square
A combination of 4 colors that are equidistant from each other on the color circle. In this case, the colors differ from each other in tone, but are also complementary. This creates a dynamic, vivid, and playful effect. An example: violet, orange-red, yellow, blue-green.