I had a local shop do it. It was a decal shop, they made signs for cars for like advertising business, they also did window tinting. Check locally to see whats near you. As for the color personally I like white. Be sure to post pics once you get it done!
2009 Vista Blue Mustang GT manual with 10" white racing stripes. C&L street CAI, SCT tuner with 91 Race tune. 14" antenna, 2010 mustang gt "belly pan", sequential tail lights, Hurst billet competition plus shifter, Borla ATAK catback exhaust, Kooks LT headers with Catted H pipe, mid-mounted dynomax race bullet mufflers (as resonators)