After your post @tinyliny I looked up the sales ad and went to the website for the farm. Dam is black splash and sire is black homozygous roan and splash as well. No grey. Sire has same white above one eye so it looks like that would be a marking and not goggles.
Knowing the parents information answered the question as grey does not hide so one parent would have to have gray to pass gray.
If you are looking for a blue roan then he is one.