I purchased some fabrics and added some that I had and set about making the piece. Done in fusible applique and machine buttonhole stitched, it wasn't really hard to do.
I actually wish I had used other colors, although these go very nicely together. There would be so many color combinations that would be gorgeous.
It is actually, as I said, rather an optical illusion - sometimes looking as if the light were on top of the dark, instead of vice versa.