The document discusses the color wheel and color theory. It explains that there are three primary colors - red, yellow and blue - which can be combined to create secondary colors like orange, green and violet. Tertiary colors are made by combining a primary and adjacent secondary. The color wheel also divides colors into warm (red, orange, yellow) and cool (green, blue, violet). Different color schemes and combinations are explained like monochromatic, complementary, split complementary and more.