At the risk of playing devil's advocate here, I personally think the colours look great now! Very VERY close to the colours from that Technicolor film print (which afterall was the intent of this project/thread) and also many film stills I have from various publications. I think the film did have a bit of a green tint towards it.
My only nit-pick is there seems to be rather a lot of DNR on that shot of R2 and 3PO in the corridor, but perhaps that's just bacause the screencap is fairly small?
I'd say keep the colours personally!
- John