working with solid fabrics

There is a give away today on Cut To Pieces blog!  She is giving the book "City Quilts" and it is a book of projects using only solid fabrics.  I was looking through all the different colors available in Kona cotton and had a very hard time trying to find a favorite.  For now, I would like to add medium gray and slate to my stash...not necessarily my favorite colors, but colors that I would like to work with right now.
Here are a couple pictures of quilts I made years ago with solid fabric.

piece,
elizabeth