So my first thought was clear, gold, and silver. But I figured I should actually look at my stash and perhaps pull out some of the neglected powders I have. So here's the list:
Basics: white and clear
Metallic: silver and gold
Sparkle: silver tinsel, red tinsel and mahogany tinsel
Basic colors: red
Enamels: aged scarlet, aged hunter, aged silver, and aged gold
And I'm going to go start now, since I should just have enough time.