Sorry......but if it's not in the AKC. Standard it doesn't exist! No matter what the breeder says. Maybe you should call the breeder and ask what they mean?
Some people use different words to describe the colors, it could just mean that it is the darker colors? That's just their way of making it sound interesting or exotic and special? I'm not making excuses for them, I have personally have never heard of that description/coloring!?