gegl-color: Take gamma-corrected colors when on #rrggbb format and for named colors
This changes the semantics to be line with the expected for CSS/HTML values. Because the format can only have 256 values per channel, gamma-corrected is also the only thing which gives sufficient perceptual precision. Makes previously added unit tests pass. Warn: changes output of operations using this type of format strings!
Showing with 27 additions and 17 deletions