I'll admit I wasn't 100% on Tiffany being in blue, so I googled it alongside the term to be sure, but it was my first choice for a guess, regardless, so I don't feel too bad about it. As for green, I had the category down for all but one choice, but wasn't sure if Happy was the one I was missing, as I don't think I've ever heard of them (unless they're referring to the Marvel character, and I separate that brand from the one being used here). I managed to figure out purple before it, though, because they've used the same sort of gimmick for that category in the past.
Edit: I went searching and saw that Happy is one of the seven dwarves, which I did know, but definitely didn't think about until someone pointed it out.