Artist 
Writer Color wheel
An arrangement of colors, based on the order of colors in the spectrum, which helps you understand color. A common color wheel has three primary colors: red, yellow, and blue, three secondary colors: orange, green and violet, and six tertiary colors. It is similar to the Ives color wheel. Other color wheels are the Munsell color system, Ostwald color wheel, and Newton color wheel.
See the Color Building Block for more information.