This is my best guess as to how this scene should look. The Death Star Walls are blue and green. Tarkin’s uniform, as has been discussed on my thread, is green (although color problems in the blu-ray don’t allow many color gradients here, which is why Tarkin’s hair has gone a bit green).
The attempts to make the walls neutral just look dead to me, like the home video releases where the color has been washed out.