I went and saw this last Tuesday and was hoping there was a thread about it already here – the print definitely leans toward the screenshots of the new trailer, so whether they were the original colors or not, that definitely wasn’t just done to give it a more contemporary sci-fi look in the trailer. I don’t know enough to say if it’s correct, but I seem to recall Kubrick having a fondness for pastel colors in the production of the movie, which feels more in line with the top pictures in 44rh1n’s comparison.
The prints were struck from an O-neg.