Well I think the problem with colors is they mean nothing well defined. It could somehow oppose extrovert and introvert for instance while Im extrovert with my close teammates but introvert with the traders yelling every second on the floor so what am I, am I even "something" personality wise, should I choose ?
I'm just worried we build little boxes and then assume we cant learn to speak publicly, explain things clearly, take the point of view of a client, resist clearly negative proposals under the pretense we're color blue instead of color purple :s