I'd suggest you go onto the website for the registry you are interested in and read the standard.
As someone else said young pups have blue eyes, eye color changes as the grow and mature. It is usually what it will be by 4-6 months of age though some change sooner or even later than that.
Ice blue eyes are more of the issue that can be associated with health concerns thus is a fault in ADBA and UKC.
It is also a fault in AKC if you decide you want an AmStaff.
Blue coat color in itself doesn't mean the dog will be unhealthy there are other genetic factors that contribute too. There are plenty of healthy blue dogs.
Do your research and find a good reputable, responsible breeder or find a great rescue dog...
As a breeder myself, I'm ttaly turned off to people who first ask about the color of pups before asking much more important questions like about the structure, temperament, etc... preferences are perfectly fine just make sure they are prioritized or you'll end up with a nice looking dog that may not suit your home...