Hmm. Without incorporating red in it at all I'd say it's hard. I usually stick with two tones. When you start ringing a third color in there it starts to become too much and takes away from the beauty of the car itself. If you use red in moderation as accents you can make it look nicer and it'll look different than a stock stang.
The only thing I've changed interior wise is I made my lights blue inside and added blue floor lights with a control switch in my center console so I can turn them on/off as I please. It's be nice if my seats had blue stitching or something though.
2012 Dub Edition V6 Mustang
full borla exhaust / steeda intake / 3.73's / aluminum driveshaft
exedy stage 3 clutch / spec steel flywheel / steeda shifter bushings