My theory is that the blue cast, which is the opposite extreme from the red in other versions, is a mistake introduced at the interpositive stage. If I remember correctly, color timing on film is done with a series of red, green, and blue light filters. It is not unreasonable to suppose that on the interpositive this print was derived from, they meant to use a red filter in the bar scene, but messed up and accidentally used a blue filter instead, then didn’t have time to go back and reprint it. So any print made from this interpositive would show a blue cast to the scene; it is possible that other interpositives were made that did not have this blue cast.

Back in 2007, I went to a screening of a very old print of Raiders, and I remember very clearly that the bar scene did not have the red tint that the DVD and other recent home video releases have. Since it was an old print, and had significant fading throughout the film (the amount of which varied considerably between scenes), I unfortunately cannot say what the color actually should be. It definitely was not blue on the print, but the fading was such that the color blue was somewhat scarce throughout the movie, so who knows. If anything, I just remember it looking neutral.