Source: Refracted light through a prism, wikimedia commons, http://commons.wikimedia.org/wiki/File:Light_dispersion_conceptual_waves.gifColor Saturation; wikimedia commons,
The seven hues of visible light: red, orange, yellow, green, blue, indigo, and violet. These hues are arranged on the spectrum by wavelength.
The name of a color.
Another term for the intensity of a color, usually refers to the purity or vividness of a color.