Color - (Wheel|Circle|Disc) (Hue Organization)

1 - About

After Newton had used a prism to separate daylight and count seven individual colors (hue), it appeared to him that this was a closed system. By taking the violet end of the spectrum and linking it to the red start-point, he thus created a convincing circle of colours.

A color wheel or color circle is an abstract illustrative organization of color hues around a circle that shows relationships between colors from:

  • a primary point of view
  • or opponent point of view

3 - Type

3.1 - Primary Colors

Most color wheels are based on three primary colors, three secondary colors, and the six intermediates formed by mixing a primary with a secondary, known as tertiary colors, for a total of 12 main divisions; some add more intermediates, for 24 named colors.

3.1.1 - Subtractive

In a paint or subtractive color wheel:

  • the subtractive primary color (magenta, yellow, and cyan) are arranged at three equally spaced points around their color wheel.
  • the center is usually black, representing all colors of light being absorbed
  • Intermediate and interior points of color wheels and circles represent color mixtures.

3.1.2 - Additive

In a additive model:

  • the additive primary color (red, green, blue (Blue violet)) are arranged at three equally spaced points around their color wheel.
  • the center is white or gray, indicating a mixture of different wavelengths of light (all wavelengths, or two complementary colors, for example).
  • Intermediate and interior points of color wheels and circles represent color mixtures.

3.2 - Opponent colors

Other color wheels, however, are based on the four opponent colors, and may have four or eight main colors.

4 - Documentation / Reference

data/type/color/wheel.txt ยท Last modified: 2017/09/13 16:02 by gerardnico