IMO it's all in the lighting and the photo. I have seen thousands of Eyuphyllia corals and have never seen (in person) a true Orange or a true blue one. Some of them can look teal with enough blue light and the fact that most peoples tanks are standard glass that has a green tint to it. That green tent can alter the color we see as well.
I would have to venture to say if there was indeed a true Orange or Blue that there would be frags for sale every where since they are a fast growing coral and would garner a lot of money for a frag!
Just my .02c
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