When you're choosing a fabric for your border, sometimes the right fabric is one you've pieced together yourself! This quilt was one I made about 6 years ago. You can't see in this picture, but the words to a poem are embroidered in the light, teapot squares, which are appliqued. I had really struggled to find "just the right fabric" for the outer border. Nothing worked until I just pieced all the fabrics from the patchwork squares in random widths. In this photo, I have not yet trimmed it all to the same width.
So remember this little trick the next time you have a hard time finding the right border fabric. Maybe it's in your scrap box!