Chow Chows are known for their distinctive blue-black tongues. The coloration is most commonly seen in this breed and can range from solid blue-black to spotted or mottled.
Shar-Peis, like the Chow Chow, often have a blue-black tongue. The wrinkles and folds of their skin can make the blue pigmentation more noticeable.
Akitas may have spots of blue on their tongues, although it is less common than in breeds like the Chow Chow or Shar-Pei.
Some Chinese Crested dogs may have patches of blue on their tongues, although it's not a universal trait in the breed.
Dalmatians are known for their distinct black or liver-colored spots, but some may also have blue spots on their tongues.
Although less common, some Labrador Retrievers may have spots of blue pigmentation on their tongues.
Similar to Labradors, it's less common but not unheard of for some Golden Retrievers to have blue spots on their tongues.
While Rottweilers are not known for having blue tongues, some individuals may have small blue spots.