What Kind Of Ecology Forms Multi-Colored Pus?Esther Inglis-Arkell5/18/14 2:00pm43EditPromoteGo to permalinkGonna eat soon? I hope not, because we're going to talk about pus. Although mostly it's white, it can be yellow, red, green, and blue. The color depends on the kind of stuff that formed it. Let's find out about the ecology of pus.