If you are in the Bothell area, I am teaching this technique in my card camps this weekend. Let me know if you want to join us.
Here is one of the cards we will make. Although it may be hard to see, that black card base is embossed with black as a tone on tone technique.
Other supplies I have used:
The Boo Crew stamp set, The Present stamp set, Hooligans level 2 paper packet, Sunset Mini Medley, Licorice Opaques