I recently sorted by color as well. I have mine in photo boxes so they are out of the light and the interior is acid-free. I never realized how many I had until I sat down and sorted. Now I see shy some say the scraps breed overnight.
I prefer a more controlled scrappy but hadn't found anything that really jumped out to me until I saw a block by Elizabeth Hartman called Mod Mosaic (
http://www.ohfransson.com/all-projec...c-quilt-blocks). They look really fun to make. She offers guidelines on her process but leaves it rather open so people can modify based on available scraps and size preference.