There are 73 2013 X6s listed on cars.com. Some with pictures.
macd1995 - there is a midnight blue one on there as well
No picture, but I bet if you called BMW of Dallas at 972-763-5528 and asked them nicely they would take a picture of it and send it to you
edit: evanevery - even your car is on there - but that is part of the three (3) 2013 X6Ms