I know it's now defunct, but casewam (I believe now babaslimes) had some incredible stuff. They were definitely a huge inspiration to me. Also agree with Man Wife from what I've seen, always especially impressed with how their purple looks.
When I first started seeing Neil from PieFightGirls use colors I thought it was really cool and groovy.
Then for some reason I thought it looked fake because obviously real pies don't look like that. Then again, I started liking syruppy (made up a word) colors.