Pure colour

  • Each wavelength of light at full saturation and brightness is perceived as a pure colour.
  • A monochromatic colour is a colour produced by a single wavelength of light.
  • Colours produced by a narrow band of adjacent wavelengths often appear to be pure colours.
  • Spectral colours are the pure colours associated with a natural rainbow.
  • Natural rainbow colours include red, orange, yellow, green, blue and violet but the human eye can distinguish many thousands of other pure colours as well as each of these.
  • In a continuous spectrum of sufficiently close wavelengths, separate colours are indistinguishable.