Thanks all for the great ideas.
Jan, I agree that one is really special!
I decided to do the dark triangles, navy blue instead of black because of the blue background on about half of them.
Think it will work nicely. May end up doing it as two smaller throws. One featuring pinks and the other the blues, purples, reds. Will be some pink in both, but trying to do his/hers for my brother and his wife. Will see how it works out.