If my guess is right then you would like the German words for a black check pattern ! "Schwarzer Karo", but without a second colour it will be just plain good old black.
Black in German is "schwarz", pronounced sh-v-arts.
Yes there were. There were even black holocaust victims. Reference the following web...
ein schwarzer Wolf - a black wolf der schwarze Wolf - the black wolf
black ----> schwarz
The Black Forest in the German language is "Schwarzer Wald", which means literally the same thing.