What is a characteristic feature of the Dun horse color?

A characteristic feature of the Dun horse color is the presence of a dorsal stripe and often zebra-like markings on the legs. Duns are known for their unique coloration, which can range from a pale yellow to a darker, more mouse-colored hue. The dorsal stripe, a darker line running down the back of the horse, is a distinct identifier of this color pattern and is often accompanied by leg barring or zebra stripes, which adds to the visual uniqueness of the Dun.

This combination of traits sets Duns apart from other horse colors. While the other options mention specific colors, they do not accurately represent the traits associated with the Dun coloration. For instance, a solid black body color, chestnut red, or a typical sorrel body color does not align with the distinctive features characteristic of a Dun horse.