I dnt really know what you mean, but GSD's are a classified as Working dogs.
There are various types of shepherd dog breeds, not necessarily related to each other, although there work may be more or less the same, for which they were developed.
Generally GSD's are black and tan, with the tan colour being more dark in some and less dark in others. Although there are other colors also like greyish and black, etc but black and tan being the one prefered in the ring. I have also seen a white one, rather an albino.