Don't worry, I watched Fon's & Porter's quilting this morning, and the guess was a fabric designer. The quilt she was walking the audiance, had some slips of material sewn with the wrong side out. You are right she said the back worked to [mellow out] the bright colors of the quilt.
Why don't you make a pratice piece, maybe 18"x20" to see if it is something you may want to enlarge.