OK, I can't find a definitave answer on this...
What color is the ESB flight suit? I've seen fan-mades that are light grey, light blue, dark blue, dark grey, etc. But what color was the screen used jumpsuit. I believe its smokey grey. Lighter than charcoal, but darker than the ROTJ pale grey.
I have combed countless screen shots, captured stills from the DVD, looked through the production stills, etc. In the screen captures, the colsest thing to "normal" lighting, is in the Bespin hallway during and after the Vader chat. The white hallway posed shot clearly looks medium grey. (I know the prepro suit was slate blue-grey)
Anyone have some insight?