Red = Busy (Reading forums, Playing a game, taking a break, Wife is upsetting my game)
Blue = Ready for a game ( no one is currently bothering me in the house, I am bored watching reruns on T.V.)
Grey = Stealth Mode ( I am a reclusive trying to work on my average...LOL
Green = Available to ALL to see you on here ( watch out for this one, you can get game/friend request occasionally by total strangers. But noting like the Blue one which opens you up to who ever for any reason...lol
Green = My opinion should be a different color since this is for Friends Only to see you online.
Hope this helps with a bit of humor