I'm watching the bluray of 2001 at the moment and wanted to add that the scene where Dave and his colleague go to replace the "alpha echo 35 unit" that HAL states is failing Dave is walking through a tunnel very briefly. This happens around 1:12:15 in to the movie and the whites were obviously yellow in the film print whereas in the bluray they are more of a white and grey tone.

I am noticing very many color timing deficiencies between the film and bluray where the film is much darker, more yellow, and the bluray is much more neutral and dull.

The scene where Dr. Floyd is flying towards the base on the moon... the rocks were definitely more brown but the tone was so dark on the rocks that you could barely make it out. I may be new to this game but film definitely seems to be much darker in general and the colors are more saturated and maybe a bit too much at times.