This shot is from the Senator Tech IB print. Less-saturated blue walls, definitely black Vader.
Yes, admittedly this is from a camera with probable auto-white-balance issues, and who even knows about the projection, but still... I just remember this part of the film had some crazy blue problems in the 2.0 workprints and Harmy opted not to make it so blue based at least in part on the Senator reference.
