I have one collegue. He's so nice, really great guy, loving dad, awesome. But we had this test about what personality you were with colors and he was worried because he was red and red was bossy, controlling. He said why am I not green? You're all green, caring but I'm caring too. So he told us he was worried about it and I said: ah that's because you're simply a bossy jerk.
You can't make these jokes to just anyone though. We got a new collegue. He says: What color are you? Color? He had no idea, he didn't know that test. So he says: oh so you're a colorless person. Sometimes he goes too far with the new ones that don't get this humor hahahahahahaha. Or that other guy. He tells him: I saw you on your small bike. It looks so stupid. I thought: it's just a kid's bike. He says oh well nice that you didn't mention it then so it didn't destroy my last spark of self esteem. We just never have any problems at the office. It's always fun. If you don't like something about someone you can simply make an insulting joke with a bit of truth in it. Problem solved.