The argument can't be settled, because some people think brown only means dark brown (why?) and that light brown eyes aren't brown (why?), they're hazel. But some people (including me) think that hazel means greeny brown.
Oh and for those who insist that the only eye colours are green, brown and blue...there are definitely people with greeny brown eyes (aka hazel
) where you'd be hard-pressed to decide they were either brown or green. And some people have grey eyes.