Proper grey color in grille and tail lights

I am hoping someone can tell what the proper color is to refinish my sharktooth grill and the tail lights. I can't seem to find the right color and I am getting tired (and broke lol) of buying spray cans that don't match, or maybe I am just too pickey. Anyway, I am sure there must be color that will match the factory color and someone must know what that is??