Observers and Illuminants

Illuminants and observer angles are used in all color spaces that use reflective (instead of transmissive) light. Here are a few brief overviews of what these are and what they do:

To adjust the illuminants and/or observer angles on a color:

lab = LabColor(0.1, 0.2, 0.3, observer='10', illuminant='d65')

Two-degree observer angle

These illuminants can be used with observer='2', for the color spaces that require illuminant/observer:

  • 'a'
  • 'b'
  • 'c'
  • 'd50'
  • 'd55'
  • 'd65'
  • 'd75'
  • 'e'
  • 'f2'
  • 'f7'
  • 'f11'

Ten-degree observer angle

These illuminants can be used with observer='10', for the color spaces that require illuminant/observer:

  • 'd50'
  • 'd55'
  • 'd65'
  • 'd75'