I went outside my comfort zone with my idea for the cornerstones, I normally would have gone with a solid grey or black, but I was thinking of a baby blue when I did my fabric search this morning. I stumbled on this Laurel Burch fabric with stars in it and bought it for the cornerstones and the binding. The sashing will be white.
Here's a picture of the fabric I purchased and also a picture of a mock up of the sashing with the blue cornerstone using a similar fabric I had in my stash.
I have about 30 more blocks to make so progress is slow but I should have the rest of the blocks made by the time I receive my fabric for the sashing and the cornerstones.
I have one more decision to make on this quilt and that is what to do for the back. I've done some fabric searches for backing fabric but I can't commit to anything. I'ms going to wait until this top is completely finished before I do another search for backing fabric.