U.S. Art Supply 4" and 8" Color Mixing Wheel Set - 2 Double Sided Color Mixing Guides - Learn How To Mix Art Craft Paint Colors - Artist Primary, Secondary & Gray Shade Mixtures The 4" and 8" double sided color mixing wheels are easy-to-use color mixing tools that help you quickly mix your desired colors, so you can paint with color confidence. They allow you to visualize numerous color schemes so you can create harmonious color combinations. You'll quickly learn the full spectrum of colors, so you can bring your creative vision to life. Wheels are easy-to-use educational tools that help you learn how to have fun with colors. They're a must have tool for the art classroom and for artists and painters of all ages. Both wheels feature primary, secondary and tertiary color mixtures, tints, tones and shades, complimentary, warm and cool colors on one side. The flipsides of the wheels contains a gray color shade scale along with key information about color terminology and the definitions used by artists.