Thanks Jupiter - that is really cool!
I spend way too much money at connectingthreads.com, and they have a feature where if you add your fabrics to your "design table" you can look at them in black and white (among other things). It really helps to see the values. But - I didn't buy these fabrics there so it's nice to see them in B&W! Except now I want to rearrange my fabrics in the picture so that the lights are together...