It should be noted that the color timing of the oot seems to be MUCH more yellow than any of the laserdisk rips I've seen, so even then laserdisks might not be a good comparison for color reference. (if the same applies to indie)

A reason tod and last crusade might lack a yellow tint? Perhaps they used different film stock? Or they simply didn't care as much about restoring their original colors. (However looking at the timing of empire vs star wars film stock/time period might have A LOT to do with it.)