I usually don't pick a color that blends with one color. I tend to pick a color you can see on ALL the fabrics but does not stand out and take over. I might pick a darker tan or a gold...maybe the purple in the larger squares I might go with a light purple. pull out some thread and lay it over the fabric to see what it will look like. I even have a spearmint green that acts like a neutral. Love that pattern. I have used it more than once