I was in James's camp until I actually looked at them side by side. Academically, Blue -> Cyan seems obvious, but aesthetically, James's Green -> Purple mapping is jarring (maybe that's why the Drazi fight their civil war?), and the gestalt of Andy's original mapping is pleasing.
Thanks Topher, that's what I think, too. The more I ponder this, the more I keep coming back to exactly what I started with. So, I've decided not to change it.
So thank you all again for the excellent input! -- Andy