I think that picture must have been taken as the sun was going down behind the mountain. If you look at the front, it appears dark grey, but that's because the red is in shadows.
The top frame of the car is black because it wouldn't have been seen with the roof on it.
I believe the "blue" thing at the back is ceiling of the jeep roof, but it's torn back on it's hinges. It can't be a new plastic cover the searchers put there because you can see piles of leaves on it where they fell naturally. Also, notice that the chrome bumper looks blue also, which I think is just because the light is dim.