Which type of horse color is described as a "black horse"?

A horse described as a "black horse" typically refers to one that has a uniform dark coat. This coat is predominantly black without significant markings or variations in color. True black horses have a distinctly dark appearance that does not fade to brown or display any lighter shades. It's important to note that some "black" horses may have a brownish hue in the sunlight or may show some lighter coloration around their muzzles or eyes; however, for classification, a horse must be primarily black to fit this description.

In contrast, other options represent variations in coloration that do not fit the strict definition of a black horse. For instance, horses with brown shades or varied coloration deviate from the uniformity expected in a true black coat. A predominantly white horse, of course, cannot be categorized as black at all. Thus, the distinguishing feature of a horse primarily possessing a uniform dark coat solidifies the understanding of what constitutes a black horse.