By two tone I assume you mean chrome and blued though now with cerakote etc it could be anything.. I always like the coco bolo grips. If you go to Esmeralda grips you'll see more styles and colors them you'll want.
I have a 2-tone 1911 .22 on an Olympic Arms frame (parked) with a J.A. Ciener (black w/a parked barrel) slide assembly with smooth rosewood grip panels.