I had a friend once (he died 23 years ago) who wore a different colour every day. And he always wore a particular colour for a particular day, based on the early gods and goddesses and which one ruled the day. So for example he'd always wear yellow on Sunday (for the Sun)white on a Monday (for the Moon), etc. And he saw each days as having particulalr qualities based on what he saw as the ruling energies of the day. He was a very talented (and eccentric) man.