I've heard the term "Blue Devil" used before. I first heard it used in a book in the 80's and more recently in an effort to described barred labs. They can give off a bit of a blue look, but it's really more grey.
OP, here you go (pay not attention to the Midas in the first pic!):
OP, here you go (pay not attention to the Midas in the first pic!):








