Most common color of yarmulke...?

Looks nice. But, do you really want to buy, when you can just borrow. Usually there's a bucket of Yarmulkes outside the sancturary. If you look inside, most says things like "The wedding of Sue and Bryan Brodski" or the "Bartmitzvah of Shlomo Moskovitz." You're more than welcome to borrow one for the afternoon. Most are solid colors that were picked to go with occion.