Lol oh I was actually saying it because the stud owner was/are claiming that you get a colored foal. While technically that is true, most people would think that colored is the tobiano pattern. More so since roan is not a pinto pattern.
They couldn't guarantee colour even if he was homo for tobiano. Yes, the horse would get a tobi gene, and yes, tobi is dominant. But.... tobi can minimally express, from high white on the legs through to completely solid horses with no white at all. I have seen pics of a mare that has tested homozygous for tobi and has no white on her at all.