Another idea...I have done quilts with just an accent between the border and the quilt. I do that by cutting strips of fabric about 1 inch wide and then fold in half like you would for binding. Add that to the quilt with the folded age toward the center. Then add the border. It will make about a 1/4 inch accent between your quilt and border. I still go for the green border just because I like a darker border rather than a white or light.