Pastel Banana or nah?

Hello! I just have a simple question on whether or not this boy is a pastel. I think his breeder said it was a chance it'd show when he was older, but it's unclear.

https://ball-pythons.net/gallery/files/7/1/6/2/8/1.jpg
https://ball-pythons.net/gallery/files/7/1/6/2/8/2.jpg

And here's a bonus image of when I first got him so you can see how his colors have changed:
https://ball-pythons.net/gallery/files/7/1/6/2/8/7.jpg

Really need a picture in natural light with no flash. First 2 pics looks like something is going on but seems to be with a flash and that can distort color ( really looks to me like yb) Last pic looks like just a nice banana to me. But if you can get a good picture would be easier

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