Markulous

So, I've got a smaller size husky by the name of Seren (Welsh for star) and I've been trying to figure out for quite a while what type of husky she is. I've narrowed it down to either a piebald or just a white coat. The only reason I think she could be a pie bald is because she has a single spot on her back but I don't know if there has to be a surtain percentage of black to be considered a piebald. If anyone could help me, it would be very much appreciated.