This is a handy color mixing guide for students, amateurs and professionals alike. Students, & artists can use it while painting. It has a color-mixing wheel and a color relationship wheel. Choose colors from gray scale, pure colors, tints, tones and shades. It contains handy definitions for colors and terms like hue, tint, shade etc. Color-mixing Wheel: select color on outer wheel, then align it with a color on the inside wheel. The mixture appears in the window. Color-relationships Wheel: point the arrow at a pure color and the center diagram points you to its relatives like triads, complimentary colors, tetrad, split complimentary etc. This color card is a very simple and handy tool for both amateur and professionals, A fun way to learn about colors and provides a nice introduction to color theory for students. Product Features:- A Handy Color Mixing Guide for Students, Amateurs and Professionals. Gray Scale, Pure colors, Tints, Tones and Shades. Mixing: Select color on outer wheel, then align it with a color on the inside wheel. The Mixture appears in the window. Relationships: Point the arrow at a pure color and the Centre Diagram points you to its relatives like triads, complimentary colors, tetrad, split complimentary etc. A Very simple and handy tool for both amateur and professionals. A Nice introduction to color theory for students & artist . Size: 14 cm Diameter Wheel; Material: Thin Card-Board.