My male is a BlueBrindle. His mother was a brown/tan brindle and his father was a blue....so yeah...a blue and a brindle would be whats he/she is mixed with.
Rat terrier
I own a bluenose brindle and both pf her parents were solid blue and some white
I got a lil brindle pit...he lookz a lot lik a brindle puppy but people say he looks mixed he got the blood of a brindle to