I'm going to do a scrappy design from Cozy Modern Quilts, so I had to expand the range in each color by adding more prints, a couple from the newer Lida Enche collection, Painted Summer, and the rest from stash.
I made some of the centers today, the yellow-green surrounded by red frames. Even with a range of prints, the values in each group are very similar. But I started to realize that the darkest blue-greens are too different in value to work with the lighter blue-greens. I'm going to have to decide between medium-to-dark and medium-to-light. There are more in the starting collection on the light side, but that may not work best for the quilt. As I get more center sections done, I can evaluate the backgrounds that work the best. Blues and blue-greens are the biggest components of my stash, so it shouldn't be a problem finding more fabrics to fill in.