What is the rarest color of the Neapolitan Mastiff?

The rarest color for a Neapolitan Mastiff is solid chocolate, a deep and rich brown hue. While blue, black, brindle, and tawny are more common, the chocolate color is less frequently seen and is often highly prized by enthusiasts of the breed. This rich, distinctive color adds an extra layer of uniqueness to an already impressive dog, making dogs with this coat color particularly sought after by those looking for something a bit different in a Neapolitan Mastiff.