Abdó Roig-Maranges authored Jul 31, 2012 and Sebastian Ramacher committed Aug 01, 2012

If option recolor-keephue is true, the recoloring algorithm
only adjusts the lightness of the original color, keeping the
rest of the properties close to the original.

When recolor-keephue is set to false, the recoloring is performed
as it was before, interpolating linearly between recolor-lightcolor
and recolor-darkcolor except for a different weighting for the
lightness which is closer to perception.

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>