So far she is the only one that is all black too, one of the others has just a tiny tip of white on the end of her tail, the other has a white patch on her chest and between her back legs, and the last is the sunshine yellow one :)
I don't have a cat at the moment, though I have always loved the little critters and had at least one for most of my life. :)
My last cat was Storm, he ran away when he got out of the house and we haven't seen him since. (Yes, fixed, so no babies from him wherever he is now.)
My older girl...