Color solid

A color solid is the three-dimensional representation of a color model, an analog of the two-dimensional color wheel. The added spatial dimension allows a color solid to depict an added dimension of color variation. Whereas a two-dimensional color wheel typically depicts the variables of hue (red, green, blue, etc.) and lightness (gradations of light and dark, tints or shades), a color solid adds the variable of colorfulness (either chroma or saturation), allowing the solid to depict all conceivable colors in an organized three-dimensional structure.

Painters long mixed colors by combining relatively bright pigments with black and white. Mixtures with white are called tints, mixtures with black are called shades, and mixtures with both are called tones. See Tints and shades.[1]
Side-by-side comparison of several different color solids for the HSL, HSV and RGB color models. Potential shapes include (but are not strictly limited to) cubes, cylinders, cones and spheres.

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