QuiltE--I'm thinking about not using a white or other light color at all. So, it would only be purples and blues--mostly mediums and darks. One color would be the background (white in most people's versions) and the other would be the design fabric.
I am working on constructing a coloring version of this quilt using graph paper to play around a bit with the colors and I may end up with something closer to the pink and green version or one of the other similar ones where the colors are spread either horizontally or diagonally. If I do this, then I have to figure out a background fabric.