Colors on the other half (blue, purple, green) are your cool colors. The colors on the first half (red, yellow, orange) are typically your warm colors and are used for objects that are closer to the light source. In my Making Brown Paint Blog, I demonstrate how to use primary and complementary colors to make different brown colors. Pairs of Complementary colors, which are opposite of each other on the wheel How to mix the Secondary colors (orange, green, purple) They key takeaway from your initial learning of the color wheel is to remember: