You could cut the colors used to apply different shades significantly in each frame, without having to really touch the spectrum. For example, in a single frame, you could get rid of 3 or 4 uneccesary colors without changing the end result much

I added it to the description now, but I forgot to say that it was meant to be a higher resolution version of this. It is sort of odd how the ears don't spin, but a lot of stuff in cat planet didn't make too much sense, anyway. Is there a way I could cut down on colours when it goes through the whole spectrum so smoothly?

Cute. Odd the face moves but not the ears

64 colors is a butt load though, it could be trimmed significantly and have the same effect.