Biggs has a black nose, which is pretty standard for pit bulls.
However, there are blue-nose and red-nose pit bulls. These are also "traditional" colors. Blue- and red-nose pit bulls are normal. They are not rare. New buyers should be wary of breeders who are only breeding for colored-noses. You are buying the dog, not the nose color.
Here are the three types of noses. They are all perfect.
Biggs and his black nose
Red nose pit bull
Blue nose pit bull
COMMENT: What color nose does your pit bull have? And does it really matter?