The document discusses color schemes and the color wheel. It describes that the color wheel is based on the primary colors of red, yellow and blue. Secondary colors are created by mixing primary colors, and tertiary colors are formed by mixing primary and secondary colors. Complementary colors are directly opposite each other on the color wheel, while analogous colors are side by side. Triadic colors are three colors evenly spaced. Warm colors like red, yellow and orange appear to come forward while cool colors like blue, green and purple appear to recede. The document also defines hue, saturation, value, and color processes like CMYK and RGB.