First, Unlock the Ford GT in the Racer career. The car is with the Exotic Series of events. Then select it when starting a race on any of the desert tracks that have a moon under the weather conditions and select Midnight Blue Metallic as the paint color. Then, just pause the game during the race and take a Dreamshot of the car.
There have been reported issues with this achievement not working correctly. To fix this, start any night time event in one of the desert areas and once the event starts, back out of it and start a free roam. Once in the free roam, you should start in the same area you last raced in. Pause the game and take the snapshot for the achievement.