http://www.libertango-libertin.com/rainbow-stripe/

Why do clothes with thin stripes always give off rainbow colors on television?
I got a feeling alot of ya’ll dont know what I’m talking about, but I don’t know how else to word it.
i know exctly what you mean. i believe it is because it is trying to display too many colors (black/white/black/white) in too small of a space. most televisions use only 3 colors (red, yellow, and blue) to produce the wide spectrum of visible color. but when it is trying to make black and white in a small spot, the colors tend to mix and create the rainbow effect you are talking about…
Side Stripe Rainbow Nails