I think the issue here is, that even if film stills were used in the book, there’s no reason to assume the colors are accurate. For one both the scanning and printing would introduce inaccuracies. Then there’s the fact that the colors were likely adjusted to look appealing in the book, and not so much match the film. Just look at the Topps cards, which often contain many film stills, but none of them look like the real thing, with colors often balanced, or altered. The reality is that these photos are likely no more accurate than any of the telecines, where the colors can be in the ballpark, if the operator was going for accuracy, but usually are not .
The Books are useful for Spotting when something is Inverted in Special effects… If We take Alderaan for example it is Blue then in the Next shot where Tarkin is Looking at it out the viewscreen it is Cyan. So What Color is it?
The Answer for you is most probably it is both Blue and Cyan… I would not expect any less I don’t mean that in a nasty way or anything but your conclusion is probably oh well that is what the film says it should be and not question the fact that it changes between the first time we see it to the second time we see it.
I however do not look at things like this if the same Object changes Color between shots, as in noticeably quite different and it is an effects shot… It causes me to ponder to answer such a question… And I wish people here would discuss why the Planet is Blue then Cyan in the next shot…Never mind the Pink Console Lights which a red Console Lights Later… Anyway The Deleted scene is very cool I think and it is what makes the books good but it also can give up some Answers too especially for Color Inversions and so on Like in the Tractor Beam Matte Painting is much Worse now than it looked on TV because it has reverted to the Theatrical Scan Version and not the Fixed Matte in the 4:3 Version. But the Fact that this was prepared for Broadcast in this fashion without error should tell you something, it went out on TV Fixed and it is also in a storybook from 1978 😉
^ This I think looks pretty Good though from that Book, I would go as far to say it is the best still in the book for what Reality was on set, I would say yeah best still in the book.
Found this one just now and it Adds up… Looks good to my Eyes.