It comes in black and dark brown, but to be honest the black is not severe. I have used it on both my eyebrows and eyelashes, and saw the results instantly. I have even done a video for you, with a brow demonstration.
It is available from Boots for £8.20, which considering it is a years supply is a great price!
So in conclusion, if you are fed up of filling in your brows everyday, or putting on 5 layers of mascara to make them super black, this may be the product for you :)