Note how his head is black but the rest of his body is white. According to Killzone_Kid, the skin is slightly darker, just not enough to match the head colour but it still looks white to me :)
Shooting him corrects the skin colour at some point, it sometimes happens before he dies, sometimes after.
When created through createVehicle, it gets even worse as the head will always be white, just like the body.
Using setDamage on the unit doesn't correct the problem either. {F25682}