The challenge was simply to use sponging.
I used three different colors of Distress Ink - Worn Lipstick, Barn Door, Fired Brick - to sponge the background. Then I embossed it with a Sizzix embossing folder. The card base is from Recollections. The flower is Petaloo and the brad is from Autumn Leaves. The sentiment is Our Daily Bread Designs Thank God stamp.