What is a dun horses markings called?

A dun horse's markings are typically called dun factors, rather than a specific name for the markings themselves. This refers to the combination of coat color, body markings, and mane and tail color that define a dun horse.

Here's what makes up the dun factors:

* Base Coat: Duns can have a base coat of bay, chestnut, or black.

* Dun Dilution: The dun gene dilutes the base coat color, resulting in a yellowish-brown to grayish-brown body color.

* Primitive Markings: Duns typically have primitive markings, like a dorsal stripe running down the back, zebra stripes on the legs, and a shoulder stripe. These markings can be faint or pronounced.

* Mane and Tail: The mane and tail of a dun horse are usually the same color as the base coat, but can sometimes be lighter or darker.

Examples:

* Red Dun: A red dun horse is a bay horse with dun dilution, resulting in a reddish-brown coat.

* Blue Dun: A blue dun horse is a black horse with dun dilution, resulting in a grayish-brown coat.

* Grulla: A grulla is a dun horse with a base coat of black, resulting in a grayish-blue coat.

So, while there isn't a specific name for the markings themselves, the combination of coat color, body markings, and mane and tail color is what makes a horse a dun.