Group Memberships Colours Question?

Im very curious as to what the different colours (colors for our USA readers) for the members represent that i have noticed on the "What's Going On?" / "Currently Active Users" statistics list, im sorry to have to ask this question, but i tried multiple searches and i have searched high and low for the last 15 minutes and i can't find the answer for myself anywhere, so far i have worked out for myself that:

Lime Green = Peon (New Members)
Green = Registered User (Also Mods Are Green, But Black In Posts & Profiles)
Red = Banned
Gray (USA Grey) = ? (Im Guessing, Yet To Validate Email Address / Account?)
Pink = ?

When i click on a Pink user it says that i don't have permission to view that profile, but i can click on a Gray / Grey but i can't see and workout for myself as to what makes that member different, also are there any other colours / colors?

Yeah i know thats its a noob question, but i am new here so please cut me some slack.

Edit: Hmm i think that my guess is right for Gray / Grey, because they have 0 posts, its just Pink / Peach that is bugging me now lol...

 

Pink/Peach is people who need to get their account validated by Shawn, because they changed their email.

It takes months, and the advice is:
DON'T CHANGE YOUR EMAIL!