You can do a lot with the frame. Gunmetal with some red flakes would pop. Same with swingarm.
Maybe do black lower arms and red uppers. Don't forget the stem, hubs, grab bar, bumper, etc. The little pieces, levers, covers, engine, etc. Just try to think over everything before you start.
Also, the seat can really make a color scheme come together. Not sure if CSL still makes cover, but he can get you a nice one.