I feel like there should be more colors available and I wouldn’t care what tier they would be at but here are a few I would find very cool.
Navy, Peach, Grey, Aqua Blue, Emerald.
I also think it would be cool that as a team member (Event Team, Wall Mod etc) you could pick a color that you could use but once you quit, get fired, or are retiring it would leave since it was a special perk.