zombie84 said:

So the green and blue hues of the Death Star interior are the original cinematography.

I've also noticed that green/blue hue in several pics, but I'm not so sure about this. Artoo in the canyon also have some of that green hue in the photo along with several other scenes that are not taking place at the Death Star and look at the pink shifted lights in the wall when Obi-Wan faces Vader. But I agree that they shouldn't be neutral gray, as there's always different lighting conditions on the sets etc. here's a more subtle attempt by me.

I don't know, it's beginning to look like The Matrix... :)