Browband colours, what colours suit different coats??

occasionaly make brow bands because it is relaxing and sometimes u make a profit.

I was just wondering if there are any rules about what different colours can u put on certain horses.
(example: White on black or no white on white)

^^^ if those are wron please correct me.

Is it ok to put white on a white horse????

Please tell me any rules an what colours suit different horses coats and so on.

cya, rokchik