Scientifically, color is the result of various wavelengths of light perceived by the human eye. The range of colors present in a rainbow, which transitions from red to violet, make up the visible spectrum. In art terms, the word “color” is interchangeable with the word “hue.” The primary colors, or primary hues, are red, yellow, and blue. Combinations of primary colors form all other hues. Two primary colors are blended to form secondary hues such as green and orange. There are even tertiary colors, which are made up of a blend of at least three hues.