No black Ken Smith strings.
Your roundwound options are DR Black Beauties, Rotosound Nexus, or Aurora strings.
Or you can get black nylon tapewounds. Daddario, Fender, GHS, Labella, and Rotosound make them.
Ken Smith does however make some damn fine bass strings in standard steel and nickel colors.
Here's where to buy them: http://www.bassstringsonline.com/Ken...ings_c_15.html