- complementary
auto complementary(Colour colour)
Undocumented in source. Be warned that the author may not have intended to support it.
- contrast
real contrast(Colour1 colour1, Colour2 colour2)
Undocumented in source. Be warned that the author may not have intended to support it.
- relativeLuminosity
real relativeLuminosity(Colour colour)
Undocumented in source. Be warned that the author may not have intended to support it.