channel box attribute colours?
 

Hi Ive just recently upgraded to using maya 5 from 4 and have noticed that the colours of the attribute change when setting keys, when animating. I know that when it turns red it means a key has been set. and that blue means the object is constrained. My qustion is what do all the other colours represent ie yellow and other colours too.
Answers would be most welcome as its been bothering me for a while now and i cant seem to find the answer.

Thanks, regards Dave

I know that Dark Gray = attribute is locked
I dont have maya open right now, but I think either purple or green means that an expression has been applied.