I've made this pattern several times, both with and without sashing. I agree that without sashing adds a really nice secondary design. I did it in all beiges and browns for that one. The truly scrappy one I did was with sashing and added a gold sashing. But if you want to bring out a certain color in the quilt, use that one for the sashing - and make it at least a 2 1/2 inch wide sashing to show up. Since most of the fabrics in the blocks are prints, use a plain or tone on tone to bring out the prints in the blocks. It's a fun pattern to try out in one colorway as well. Good luck