Here's a card I made using tone on tone color. It's almost a one layer card, using the same color cardstock twice. I also added flooring and sone dots to fill in space. Since this was a masculine card, I decided not to use sequins.
Simon Says Stamp Olive Green Cardstock
Versafine Black Ink
Mama Elephant Three Amigos Stamp Set
Black fine point pen
Copic Marker in N9