Why not just transparent? (also, 23 colors is really high, I'm sure you could cut this in half if you want to reduce your colors to the max).
Just wanted to use as low colors as I could.
Should I change it on grey, what do you think?
I'd get rid of that white background.
Otherwise, it looks cool!
Cuz shadows on the ground won't match with transparent. It looks weird.
I do 2 - 3 colors per element (it could be the same colors) to make it volumetric.
I can't go lower.