Answer
I suppose it depends on what fashion you wanna
follow - but really if you wanna
dye your hair black then do it. it can sometimes be a little tacky, depending on the look - for example make sure you get a nice
coverage because patches in hair dye looks awfull!
better yet go to the hairdressers and do it they will advise you on the best shade of black for your skin type, or maybe if you have very light skin then a darker brown or red might be better. i personally love black hair though :)