Also, been looking at that clip of the new ROTJ footage, where Luke is in cave with the lightsaber and Vader is on the ship, and it seems there is quite an obvious green cast in parts. It seems either this could be due to the way it was filmed with the video camera, or ROTJ could be following a new green colour scheme, much like how ESB was nearly all blue...
http://www.youtube.com/watch?v=18O-Rj2MP9Q
I dunno, maybe I am looking far too much into it lol.