I'd go green for a more updated look. A darker beige tone on tone for an old fashioned look. I'm not real big on white unless it really enhances the fabric. A lot of color choice depends on what the quilt is for and where it will be used, not necessarily just the fabric colors. Try a bunch of different colors and tones against your squares until you find the one that just says "YES - I"M THE ONE!!!" Good luck! Picking fabrics is the best part of quilting!