Matching the color of the logo's on the bike usually works pretty good... so if they are silver, or white, then the handlebar tape, seat, cables, and tires could all go that way. Depends on what is needed for your refurb (or what your willing to replace to obtain a certain look). I would also suggest taking a look at yellow, but only if you could get yellows very close in color. Google Miami Vice Centurion Iron Man for inspiration.