Color wheel
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A color wheel or color circle is an abstract illustrative organization of color hues around a circle, which shows the relationships between primary colors, secondary colors, tertiary colors etc.
Seven-color and twelve-color color circles from 1708 (attributed to Claude Boutet)
Wilhelm von Bezold's 1874 Farbentafel
Ignaz Schiffermüller, Versuch eines Farbensystems (Vienna, 1772), plate I. Color wheels can be used to create pleasing color schemes.
Moses Harris, in his book The Natural System of Colours (1776), presented this color palette.
Color solid
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A color solid is the three-dimensional representation of a color space or model and can be thought as an analog of, for example, the one-dimensional color wheel, which depicts the variable of hue ; or
Munsell Color Tree
Interior cross section of Munsell's color sphere and color tree, 1915. Munsell was the first known person that separated hue, value, and chroma into perceptually uniform and independent dimensions, and he was the first to illustrate the colors systematically in three-dimensional space.
Philipp Otto Runge’s Farbenkugel (color sphere), 1810, showing the surface of the sphere (top two images), and horizontal and vertical cross sections (bottom two images)
Color sphere of Johannes Itten, 1919–20. A much clearer representation of his model appears in The Art of Color, 1961, which cannot be reproduced here for copyright reasons.