The document discusses the color wheel, which arranges color hues in a circle to illustrate the relationships between primary, secondary, and complementary colors. It defines primary colors as red, yellow, and blue that cannot be derived by mixing other colors. Secondary colors are formed by mixing two primary colors: orange, green, and violet. Tertiary colors lie between primary and secondary colors. Complementary colors are directly across from each other on the wheel and cancel each other out when mixed. The color wheel shows how primary, secondary, tertiary, and complementary colors are positioned and related.