I bought a 2 yr old (now 3) in October of last year and she was registered as a brown. After I bought her my trainer and I decided she was more of a buckskin than a brown. Now with some good food/exercise she has turned a totally different color. I have had people call her a dun but I'm not sure. Some people say that only duns have the dark black legs. I always have thought that in order to be a dun a horse has to have a darker dorsal stripe. I'm very curious to see what you all think. Just for fun I threw in a picture of her grey leg.
My first thought was that she was a buckskin, but it appears that she has a dorsal stripe. Only duns have dorsal stripes, unless it's just counter shading. They both have dark legs... Conclusion; I really have no idea. Sorry if I really confused you. :)
Buckskin was the first thing that came to my mind to but her head is throwing me off. It is kinda unusual that her head would be so much darker than the rest of her body. That is the coloration that you see with grullo horses but I really don't think she is a dun because her dorsal stripe isn't dark and defined. I think we can be certain that she does carry the agouti gene (causes the dark points on bays and buckskins). Her head is what is just screwing me up though LOL.
Her dorsel stripe is typical of countershading and not an actual dorsel stripe, and her head is typical of sooty acting as opposed to an actual dun with a very prominent and defined dorsal stripe. A dark head is typical to roan, not to dun, so that's definitely sooty acting. I also see no zebra stripes on her legs.
And actually, it's opposite, it's typically buckskins that will have very dark legs as duns typically have zebra striping with lighter black on the lower legs.
If you know her parents colors, it would be easier to tell. If neither of them was dun, you know she's buckskin. My money is on buckskin anyway, definitely.