The document discusses color and the color wheel. It defines color as a property of light seen on the spectrum, with hue being another term for color. The color wheel, created by Sir Isaac Newton, is a circular spectrum that shows the relationship between 12 color families. Primary colors are blue, red, and yellow and cannot be made by mixing other colors. Secondary colors of green, orange and violet result from mixing two primary colors equally. Tertiary colors are produced by mixing a primary color equally with an adjacent secondary color, such as yellow-green or red-violet.