So here is a question to gvans:
How about giving us a few bigger versions of your design, in multicolour?
Maybe try figroll's colours, just to compare.
I think I like your prison bar variation, plain black and white, the best of all of your colour schemes so far. The reason I like it is it is the one that most looks like a starfish. The moire effect at the starfish arm ends causes the eye to make the ends more rounded and gives some boundary to the illusion. It helps the human eye "complete" the figure. BTW, the moire effect could effectively work in solid colour bars too, so it isn't limited in that respect. Well done!
kind regards,
nio