I read that since the Mustang came out the most popular colours were as follows: Red (21% of all Mustangs built), Blue 17%, Silver (14%), White (13%), Black (12%)
Just seen a black GT and the dealership today while I popped in to ask about the new Ranger for work, looked really nice and hadn't seen one before. Got to say though I've not seen a colour I dislike on the Mustangs at all yet.