BlackI4se is right about needing that repaired by a professional body shop, preferably by the dealership you bought the car from, that way THEY are responsible for the color match. As for the color fading part, 15 years ago maybe, all paints now are clear coat and unless clear fades (not likely) the base coat remains unchanged. The real issue is the painter making the repair, too many variables in spraying a high metallic color like Tungsten. Zerallic, pearls and aluminum flakes react differntly to application and the chances that a painter is going to get it right on the first shot is about 35%.
Good luck.