Which of the following is not a typical color for a merle coat?

Merle is a genetic pattern that leads to a marbled appearance in a dog's coat, often combining patches of colors and a lighter base. Typical colors for a merle coat include shades like blue, black, and gray, which can all be found in various breeds that display the merle pattern.

Blue merle, for example, features a mixture of black and gray, creating a unique and visually striking appearance. Black is also a common base color that can have merle characteristics, while gray can appear in various forms within the merle pattern. However, green is not a typical color for a merle coat or any recognized dog coat color. It simply does not occur in dogs along with the merle pattern, making it the correct answer to identify as an atypical color for this coat type.