What term describes a color combination involving four colors?

The term that describes a color combination involving four colors is indeed tetradic colors. This color scheme, also known as double complementary colors, consists of two pairs of complementary colors. In a tetradic color scheme, two colors are directly opposite each other on the color wheel, while their respective complements establish the second pair of colors. This arrangement creates a rich palette that offers various contrast and harmony possibilities when used in design.

Tetradic color combinations allow for high contrast while maintaining balance in color harmony, making them particularly useful in designs that require vibrant and dynamic visual interest.

In contrast, split complementary colors involve one base color and the two colors adjacent to its complementary color, resulting in a three-color scheme. Analogous colors consist of three colors that are next to each other on the color wheel, creating a pleasing and cohesive look, but do not involve four colors. Lastly, secondary colors, which are created by mixing two primary colors, only involve three specific colors (green, orange, and purple) that do not encompass the broader set of four colors found in a tetradic scheme.