fwiw, film, like painting, is not necessarily realistic. A director of photography will purposely cast different shots in different hues in order to convey different moods: bluish for coldheartedness, red for passion, yellow for warmth and joy, green for illness, etc.

So one scene might be a different color cast than another for good reason, because of the art direction.

It would be erroneous to recolor each scene towards realism. Realism might not be the intent of the film maker.

Having said this, I do opine that DJ's screenshots look good, and they appear to restore color which has been lost due to technical issues, not artistic issues.