I was thinking of having a colorwheel GUI and add them to a client-sided 'favorites' in place of the colorset.
But as mentioned, that would lengthen the ghosting time by quite a bit.
0-63 = faster than 0-255, 0-255, 0-255, 0-255.
But what about 0-4, 0-4, 0-4 and 0-4? We don't need plenty of shades of each color. I think just having 1 digit per RGBA wouldn't slow it down too much. 625 is a lot bigger than 64, you wouldn't be missing anything, and you wouldn't have too many colors.