In the Summer she is jet black. In the Winter, she is... This. http://i1032.photobucket.com/albums/.../Photos007.jpg
Sorry for the tilty angle.
ETA Indy, that makes sense. Snow reflects sunlight from below, directing it upwards, where it would not normally shine. I was on a medication for a while where I had to wear sunscreen and sunglasses in the winter due to light sensitivity. It was worse in the winter than it was in the summer. Maybe the reflecting light bleaches some coats?