Thanks for the crits!
Here's an experiment.
I merged Yellow with Skin as suggested. I want it to work with explosions (which are common) but maybe it's a bit too yellow though. But Yellow is used for both Lego heads and Smileys, so maybe it's possible to get away with it. Real skin color is more towards pink-gray of course. However, maybe I can offset the yellowness with the skin shadow color which is purple.
I lightened the skin shadow color a bit to bring it closer to the skintone yellow, and take it away from the red so it can work as a higher value for that.
Light sky blue (cyan) was greyed a bit. it's more realistic as far as skies goes, and less obnoxious to look at. Doesn't work aswell as a plasma/energy color now though.
I lightened brown, and maybe the dark brown as well.
I did stuff with greens cuz I now had a new color cuz of the skin-yellow merge. I'm a bit disgruntled by the fact that I don't have a good mid tone green now. If I want a pure green object, ZX Spectrum style, I only have a light green and a dark green. The eye is indeed more sensitive around the greens. I think, to avoid banding, one can use dithering with advantage, since plants tend to be gritty. The sky on the other hand is more sensitive, so deliberate banding or decorative clouds will have to be used. I recall Ptoing did a mockup with cloud mountains which worked rather well.
I kept my darling darks.
I pretty much stole Helm's tree.
