No I haven't, though I would really like to! Particularly in my youth when out clubbing, I used to wear wigs to shake my look up a bit and I would have loved to try some of the different contact lenses.
However, I have scarring on the inside of my eyelids after a really nasty eye infection, so I can't tolerate many kinds of contact lenses, including the coloured ones :(
My eyes are not very black, but yes more on the black side. I have used both ordinary and natural brown lens. They were hard to get in initially but very easy to get out. I actually liked the natural brown lens and so did my husband. I would not try other colors like blue or green. They just won't work on my face and skin color.