Bubba is a little difficult to distinguish in the summer whether he is bay or brown, but he screams brown in his winter fuzzies. During the summer, his "soft points" are more of a mealy color rather than a lighter brown which make it more difficult to tell.
It's looks like less of a brown than the others. On my laptop, I had a picture of a typical brown arabian in winter coat, and it showed a great example of the lighter soft spots, but I'm on a work computer :/
I would call that horse a bay. Maybe a second opinion would help.