Color theory is important for floral designers to understand in order to create harmonious designs. A color wheel represents the color spectrum and relationships between hues. Primary colors are red, yellow, and blue. Secondary colors are made by combining two primary colors. Combining colors in certain arrangements on the color wheel creates different color harmonies used in designs, such as monochromatic, analogous, complementary, split complementary, and triadic. Understanding value, tints, shades and tones allows designers to effectively use color in arrangements and store displays.