The appearance of trailer #3 most closely matches what that scene looked like in the print I saw. Since there was some fading, this would account for the moderate blues to have lessened to the point that it appeared neutral when I saw it. Other than the blue, the rest of the color was intact for this scene, more so than elsewhere on the print (some other scenes had become rather pink, but not this one).

Based on seeing those trailer shots, and the notion that the blueness fits with the cold exterior of the scene, I withdraw my theory that it was a mistake, and concur that it must have originally been an intentional part of the look. The red of later releases is simply revisionism after the fact.