The light colors are about 1/2 light colored ties and 1/2 khaki broadcloth.
I cut 5 inch squares of lightweight fusible interfacing, put a piece of light & dark fabric right sides together & sewed them directly to the sticky side of the interfacing from corner to corner. The seam allowance is anywhere from 1/4 to 1/2, it doesn't matter. Then press the fabrics to the interfacing & trim with a 4 1/2 inch square ruler.