Just an observation . .
I’ve found that color correction, especially where color results vary widely from the source, cause stressed color. That is, there are large “steps” between neighboring-pixel colors – from those that are affected a little to those that are affected allot. This effect may also vary across the individual R-G-B layers. It almost looks like artificial grain has been applied. I tried the JPEG Artifact Removal function in my paint program that I surmise looks for out-of-place pixels normally found in jpeg compression and massages them back into place . .
I like this particular “noise reduction” because it does it’s job with very little effect on actual (as opposed to perceived) sharpness. However, this whole problem might be avoided by first expanding the color-depth, then doing the corrections, and finally reducing back to the original color-depth. (I don’t have the hardware/software to test the effectiveness of that procedure. Can anyone try it?)