Follow these 4 simple steps to mix more than 1500 color combinations. Step one: look in the Color Guidance Index for the subject you want to paint - for example, "Brocoli". Step two: find the color Recipe with the subjet's recipe number("81") and a photo of the actual paint mixture. Step three: use the Color Mixing Grid to mesure each paint color. Step four: mix the color. It's easy! Also includes instruction in: Color Theory, Color Value Mixing, Graying Color Naturally, Mixing Flesh and Portrait Colors, Rendering Skies and Clouds.