So this is the original first release?
On the special edition video about creating it this shot is shown in this color and is labelled original version.
But it has extra clouds so are they missing from later prints?
I always thought this was a re-done shot.
I think it looks better that way personally but it certainly is a bit too diffetent to be the whole reel should be that color.
Special effects often end up the wrong color compared to live footage anyway.