With all due respect to Vekseid, but the new color scheme has left me a little baffled as well.
I'm sort of agreeing with you, Cherri, but I like Lords and Ladies to be seperated as well, which would require 4 distinct colors (Lords, Ladies, Sirens, Other), which is quite feasable.
Knights and Dames could get a slight distinction, or use the same color, either way's fine with me. A totally different color won't really work due to the rainbow effect.
Ah well, it's Vek's board, so I'll humbly respect his choice :)