It is very interesting that the Death Star actually did have blue walls, unlike pretty much every home release before the SE. I always hated the blueness of the 2004 dvd, but it looks like I have to clarify that dislike into the particular shade in which it was rendered, not the presence of the colour itself. They definitely overdid it to the extreme for dvd, though, evidenced by Vader's armour frequently appearing blue-cast as well, and of course the crushed blacks and pink saber and laser blasts certainly don't help.
It's strange how even within the print the colour varies as much as it does. Some shots are nearly grey while others are very blue indeed. Regardless, I can't help but marvel at the lovely contrast and detail; I've never seen it look that good anywhere. Even though the GOUT colour can't be made to look like that, it would be cool if someone were to take a shot at getting it to a closer resemblance.