Wondering if the suit colors are suitable or too casual.

They are both fine. But for the same money, go to a tailor, get yourself measured, then buy a brioni/kiton/isaia/attolini suit from eBay new with tags.

For an interview go with the navy. For general wear both are fine

Well, the mid blue says "Unfortunately, this item will not be back in stock" so you don't really have to worry about that one.

Neither are what I'd call interview appropriate, but neither are unprofessional for every day wear if that's the dress code.