A quick search will get you Fifty Shades of Black and Blue, Fifty Shades of Pink, Fifty Shades of Gravy and (strangely) Fifty Shades of Silver Hair and Socks.
But we couldn't resist the name of the dog from the Annie movie the kids had grown up watching and since her hair was a millions shadesof beige and brown, gold and copper, silver and cool grey, plus black and brown — «Sandy» seemed appropriate.