The common moniker "blue heeler" refers to one of the most popular blue dog breeds, the Australian Cattle Dog. As per the breed standard, their blue coat can have multiple patterns, such as solid, mottled, or speckled.
Dog breeds, there is only one color available for this breed. In reality, their blue coat is a pale gray with a blue tint. The puppies' coats turn blue after a procedure called "clearing," which changes their black.
The AKC recognizes the blue coat color of Neapolitan Mastiffs as conforming to the breed standard. You might notice that they have coats in black, tawny, and mahogany in addition to their blue coloring.
Weimaraners can have a dilute black coat or a steel-gray coat with a diluted brown tint. Blue Weimaraners defy the breed criteria yet make stunning dogs.
Blue Whippets are extremely difficult to locate and unusual. The dilute black gene must be present in both parents for a Whippet to be blue; however, puppies born to blue parents may not inherit this trait.
Irish Wolfhounds are known for having diluted black coats that frequently have a pale blue tint. From a distance, they could appear gray, but up close, their blue hue will be seen.
This type of dog is well-known for having tongues that are stained blue. However, their coat is also worth mentioning. The Shar-Pei coat is available in a solid dark gray-blue hue, among other colors.