temporary hair dye

[topaz]

I started to ask the Internet this, but then I realized that my friends are actually way more awesome than the Internet:

How well do temporary hair dyes work? Do they wash out right away? Do they produce bright and vivid colors? Which brands are best?

ETA: this is a one-day thing, so super-temporary dye shampoos and the like are potentially fine.

If we were to apply more than one color--say, a mohawk with colored sides--is that likely to be way too complicated for an amateur to attempt on their first try? Would we want to use a semipermanent dye for that, rather than the totally temporary ones?

Comments

[qwrrty.livejournal.com]

The proposal currently on the table involves a multicolored mohawk. Is that likely to be too complicated for a neophyte like me to pull off?

[moominmolly.livejournal.com]

Nah, you can do it. Liberal use of hair clips and plastic wrap/foil, and you'll be fine.