As long as you leave hue alone, you are fine. Then you could scale a,b directly using M as a modulator.
But if you start to tinker with hue-specific tweaks I think you are off the rails.
As long as you leave hue alone, you are fine. Then you could scale a,b directly using M as a modulator.
But if you start to tinker with hue-specific tweaks I think you are off the rails.