That scene's color was retimed and boosted with absolutely no thought given to the people running past the doorway in the background. So when the red levels were jacked up, it played havoc with the skintones of those extras.
Even in the foreground stuff with 3PO you can tell that the red was pumped up too much. The little reflections off of his body have red haloes - someone compared them to Christmas lights. I think the red lights on the walls are also visibly clipped.