"In a six-man team, how about one blue, one red, one green, one black, one yellow and one multicoloured?"
That would give the impression that the colours represented races, which they definately do not.
If you see ignorance, you should educate, not cow down and accept it.
Even having this discussion reinforces the stupid idea that there is any racial connotations in blacking up.
There isnt. Now go forth and inform the ignorant.

In the meantime, I am off to Dixie to inform the Ku Klux Klan that instead of wearing capuchons they should black up instead.
A much more effective way of displaying their prejudices, huh?