My friend has eyes so dark they look black!!
its pretty crazy.
but i dont think they would consider it "black" probably just very dark brown...
BUT!
i found this article. pretty cool :P
http://paranormal.about.com/od/humanenigmas/a/aa090406.htm
"Granted, many people have dark eyes. Although black is not a natural eye coloration, there are many people with very dark brown or dark blue eyes that, under the right lighting conditions, can look black or nearly black. But in some cases, the black-eyed people are seen in excellent lighting conditions – bright daylight, for example. Also, some of these reports say that these are not just incidents of dark irises; their entire eye appears black, with little or no white showing."