What happens when you REFUSE to wear white on court during the wimbledon grand slam?

The bowing to royalty isn't compulsory anymore, but the players DO have to wear white, although a small amount of colour is permitted. But why would you want to not wear white anyway? Unless you just wanted to cause a fuss, then it'd be a pretty stupid thing. It'd also gain you a lot of bad press, which isn't really what players want...