The British way of spelling color. Americans spell it "color" which is the better way to spell it. It's shorter and easier.
American dude: Why the hell did u spell color with an extra u?
British dude: because spelling colour without the u is absolutely absurd and---
American dude: you've gotta be shittin me!
British dude: its unproper to use colour without---
American dude: Just shut up. No one gives a fuck.