The RYB color model is comprised of the colors red, yellow, and blue, which are otherwise referred to as primary colors. You can mix them in different combinations to make every other color. Red and yellow make orange. Red and blue make purple. Blue and yellow make green. Many of you learned this in art class as kid. Artists have been exploring compositions of red, yellow, and blue for ages. A prime examples is the painter Piet Mondrian, who worked almost exclusively in these colors for over two decades.