Color transformations as Post-Process is added into Glow engine.
Currently supported transformations are contrast, brightness, black and white, red, green, blue shifts, saturation will be added later. All transformations work in a same step, so adding, for example contrast to brightness will not slow down it in 2 times.
Transformations added as scene property, and can be accessed from script.
Blue and Green shifted, to create Matrix movie look Adjusted brightness:
Black and white: