What color power bead represents love?

I wouldn't say Red, as it's a color of fierceness. Love is a relaxed state, and is not fierce, unlike that of Lust. It is also confidence that you have found something which can stand the test of time, something greater than yourself. It is pride, something you will not let another take away from you.

And for each of these, a color can be attributed.

Confidence - blue

Pride - Green

Love - Pink

Lust - Red