I hate to bring up features of other pixel editors, (especially since Pro Motion is my favorite and go-to) but there’s another one that has a feature I really like. It has a Color Shading adjuster which I think edits the H,S and B of colors to make them look lighter or darker. Here’s an image of the feature:
I also like that it allows me to change the H, S and B/L in steps. Would it be possible to implement either of these in to Pro Motion?