Black Belt

The black belt, also refered to as shodan, is the final colored belt you have in karate. Although it is the final belt, you still would have a long way to go.

Degrees of the black belt.
The black belt comes in 3 degrees. There is the 1st degree black belt, 2nd degree black belt and the 3rd degree black belt.

Origin
The first time the black belt was used was in judo, by Kano Jigoro.