Green is made by mixing blue and yellow. A mixture containing more blue than yellow makes dark green, while a mixture with more yellow than blue makes lime green, and a blue-and-yellow mixture with white added makes pastel green.
The three primary colors are red, yellow and blue; they cannot be created by blending other colors. The three secondary colors combine two primary colors. Green, purple and orange are secondary colors made by combining yellow and blue, blue and red, and red and yellow, respectively. Any number of colors and shades can be created by varying the mix ratio of the colors and adding black or white.