Hi, I have used the colours several times, and each time I have to redownload the pokerstars software, for reasons not my fault, I lose all the colour codings...
so i was forced to use them more simply, and less often for basic info...
green means the opponent may raise with not so much.
yellow means we have a "textbook" player.
red means we have a narrow range raiser to beware of.
Knowing a persons colour coding is a valuable info source, if you can ever get to see it...
UNFORTUNATELY, this info is only accessible by the operators of the sites...and is the main reason that stars is thinking about having anonymous players on the table so nobody gets recognized.