besides inverting the colors .. black becomes white, yes.
You pick the color(s) and change the "tint" setting of "it" or of everything.
before we continue, give us an idea of what you're trying to accomplish:
1) something done over 15 seconds
2) something done in under 1/5 of a second
3) changing someones face from pale-pink to beet-red embarrassment
.. the more info the better