To begin with it has no color at all because to begin with, no light has yet hit it to be reflected to your eye. Hence your eye sees nothing and might interpet this as black. But black is not a color but the absence of color. The possible exception to this would be a radioactive material that gives out its own "light" and does not depend on an external source to reflect. However, this type of radiation is not usually detected by the eye since it is a part of the frequency spectrum that the eye does not respond to.