I have actually thought of this, but I am totally ignorant of what brands to buy for temporary wash out color. What does that mean, temporary?Well, if your hair is pure white isn't that the perfect base for all the soft shades like mink and golden blonde, particularly the temporary wash-out ones? Maybe you can be any colour you like for as long as you like. But only if you wanted to of course!
I wouldn't want the color to last much more than the time it took for the event to be over. I would want it to wash out with one or two shampoos.