Honestly, there isn't any black in this rug - it is all tones of gray. Also, depending on the light, it can have a green undertone. For example, today is a gray, cloudy, rainy day and it's definitely looking greenish. I turned on a table lamp, though, and the green disappeared. The color changing doesn't bother me since I've got a white and black and gray design going on in my office area, where I'm using the rug for under my rolling office chair to protect the carpeting. It works great for that.