Long black hair with rainbow prism streaks is sure to be a showstopper. My best advice is if you have black hair and want rainbow colors, do colored hair extensions. The reason is you wouldn't have to lighten your hair, which could cause damage. Plus, the rainbow color won't fade on extension hair. If you don't want to do hair extensions, I recommend finding a hairstylist that specializes in fantasy hair colors. // Photo Credit: @keracolorhair on Instagram