This block could be useful to some people.
This block would have presets (Aka the normal colour pallets) but you would be able to edit the colours freely, the block (On activation) would check each colour on screen and change them into the closest one in the limiter’s colour pallet, (On deactivation) the block would stop checking and revert all the colours to normal.
EDIT: The reason I want this to be a separate block is that free users can’t use the Shader block (But if you are reading this and have the power to make it an actual block, idc if you make it Indie Only)