Yes, Beaucerons can be a blue merle. The merle gene is recessive, so both parents must carry the gene for a pup to be born merle. The coloring of the coat is black and tan, or blue merle. The Beauceron is sometimes known as the “bas rouge” in France.
Merle Beaucerons are rare and can command a high price tag due to their unique coloring. If you are considering purchasing a merle Beauceron, be sure to do your research and only purchase from a reputable breeder.