I match my bobbin to the backing color since those stitches will definitely show. I match my top thread to the flange color so that it matches since I sew on the flange as close to the seam as possible. I pull the binding over about an eighth beyond the line of stitching from the sewing of the binding to the back. I also use my blind hem foot (some call it a stitch in the ditch foot) to sew on the binding in front. Bring the binding over past the stitching until it touches the center piece on the foot. The center of my needle is 3.5 so I set it at 6.5 and the stitching comes just about at the seam. Clear as mud?? Ann