[Gorwingel]

I did not read the books until I saw the movies, so he has always kind of had blonde hair to me, but I have seen the drawings and art featuring him, and I like both.
Since he is a Wood Elf, it would be understandable that he would have brown hair, and also since he is from Mirkwood, you would just kind of think of darker things. Just think of it as different interpritations.