Here are the '13 Mustang colors (GT & V6) right from the order banks...
CI = GRABBER BLUE
HD = GOTTA HAVE IT GREEN
HP = PERFORMANCE WHITE
J4 = DEEP IMPACT BLUE
PQ = RACE RED
RZ = RED CANDY TINT
UA = BLACK
UJ = STERLING GRAY
UX = INGOT SILVER
CI = GRABBER BLUE
HD = GOTTA HAVE IT GREEN
HP = PERFORMANCE WHITE
J4 = DEEP IMPACT BLUE
PQ = RACE RED
RZ = RED CANDY TINT
UA = BLACK
UJ = STERLING GRAY
UX = INGOT SILVER