Darth_Coconut said:
http://www.youtube.com/watch?v=lk0PUxkfKdc&feature=related
Aren't these scenes in blue depth because on planet is getting late? Han and Luke stay outside over the night so.....
I just checked the CC version, and at the end of the scene where Han is putting the shelter up and the camera zooms out, the area gets darker/more bluish.
The original blue still looks to me like a bad day-for-night effect due to processing.