My own most frequently worn color is the multicolored exotics-- they seem to go with practically everything I have. I wear my black pearls (dyed peacock ringed CFWP) with my black tops. White comes in third in winter, 2nd in warmer weather as my clothes get lighter colored.
It's nice to have a variety of colors to choose from!
Oh, yes, I almost forgot the lavender rice pearls I got recently-- these actually go very well with many of my tops and I'm wearing them a lot.