COLOR SPECTRUM

Normally refers to that range of electromagnetic wavelengths that are visible to the human eye (as seen in nature’s rainbow). The color spectrum starts at about 390 Nanometers on one end (violet), and ends at about 700 Nanometers on the other end (red). Every visible color exists between those two wavelengths, either as individual wavelengths or combinations thereof. See also “Gamut” and “Spectrophotometer“.