If you scroll down and click on the thumbnails there are some good illustrations of whippet colours here including some quite unusual ones, but not sure any are exactly what you are describing. Could she be a very heavily marked black brindle?
http://www.bellsouthpwp.net/d/d/ddoggone/H...tics%20old.html
http://www.bellsouthpwp.net/d/d/ddoggone/H...tics%20old.html
