American Pitbull Terrier Colors Blue The American Pitbull Terrier is available in a variety of colors, including blue. The blue color of these dogs is a genetic mutation caused by a lack of melanin, a pigment in the skin. A pitbull with low melanin levels is prone to developing various diseases, including skin diseases, heart disease, and eye issues. The breed is also more prone to cancer. These dogs may cost more to purchase than black-nosed Pitbulls, though. The American Pit Bull Terrier is the Hollywood action dog, a high-energy super dog with a fiercely loyal spirit. This breed is often given an unfair reputation as aggressive, despite its affectionate…