Thanks for the info! Great photos, beautiful Yorkies, but I'm not sure that's what I'm looking for. This is one of the references to "sooty" that I read in an article in Yorkie Club Magazine;
“My ideal color on a puppy is one who is starting to break in color, but is still very dark. The head will be sooty, with the tan showing on the head and legs. The adult may still have some thumbprints at 2-3 years of age. The ideal adult color is a steel blue, the color of the inside of a gun barrel. I do believe, however,that varying shades of blue may still be correct as long as the color pattern is correct.”
It refers to a puppy that is starting to break in color ... and the head will be sooty. That's what I need to see a photo of ... a sooty head in a puppy. 
This is the link, very interesting reading; http://www.yorkyclub.com/arti09aprCopia.html