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Other Colors Determined by the Dun Gene
Besides the colors just described, there are others determined by the Dun mutation.
The combination of dun and buckskin (dunskin) results in a very light yellow or pale sandy body color with black or dark brown primitive markings (Photos ssss1–ssss1).
Palomino horses carrying the Dun gene (dunalino) resemble light palominos (see ssss1), and their primitive markings have a rusty or dark yellow color (ssss1). The mane and tail can be practically all white with only the middle part of the tail containing colored hair as a continuation of the dorsal stripe.
One of the rarest colors in this group is double cream dilute (Ccr/Ccr) combined with the Dun gene. Such horses have a cream body color with a pale caramel dorsal stripe and zebra bars, and also pink skin and blue eyes (sometimes called wall eyes or china eyes). Dun horses carrying one Cream Dilution gene often have light-brown eyes.
Another rarity is the smoky black plus Dun gene color (smoky grullo). Visually it is closest to light grullo color with a yellowish tone (see ssss1), but it is impossible to distinguish the two colors without DNA testing. Such horses have dirty-brown or dirty-ashy, yellowish color, lighter toward the underbelly, and the mane, tail, and lower part of the legs are dark brown (Photosssss1 & ssss1). They have a remote resemblance to faded black (see ssss1). Foals are born an ashy color that is lighter than grullo.