Some hair colors are more common than others.

Pink and green should never be seen, don't mix warm and cool tones, only use light colors in a small room – the list of color clichés is long, and as designers are keen to point out, often wrong.

I’ve always been partial to blue. But if I had previously known about the color “olo,” then maybe it would’ve become my favorite instead. Call me naive, but I guess I thought ROYGBIV remained king.