Well, I have made quilts with white fabric and quilts with black fabric. I have seen some beautiful quilts that the sashing was done in other colors and these quilts are really appealing to me. I have used mainly white or white on white fabrics for my sashings but I have a couple of quilts in the hopper that I will be using a silvery grey and an olive green for the sashing. I think it is more important to audition your colors and choose what appeals to you.