Two of mine are a Yorkie/Maltese mix and are as different as night and day. Bogey has a silkie coat, brown eyes and takes more after a Yorkie in his face~he is totally blonde. Doodlebug has a cottony coat, black eyes and takes more after a Maltese with almost white hair. Neither have black or gray hair like a Yorkie other than the stray hair you will find mixed in with all their blondeness. Really when you have a mix there is no telling what they will look like as an adult. They are in my avatar and are both rescues. Good luck with your new puppy.