Treating RGB colours as XYZ coordinates leads to some interesting effects, such as rotation and skewing. Each of the below are the result of applying a single MapColors() per frame, using the same matrix each time.
Rotating 15 degrees per frame around the r=g=0.5 axis
Spiralling towards the grey axis
Red and green converging on a value
Certainly a neat toy, but I don't know whether it'll ever be a practical technique, especially if used as a dynamic effect at runtime.
(and, on the off chance anyone cares to see the undoubtably low-quality code, have a link)
