John,
I'm thinking that the park lights and tail lights used the same color around the lenses. I have not yet decided which color to use,but it appears to be a silverish gray like the bottom of the grille and headlight bezels. I used GM 8867 silver from duplicolor in a spray lacquer on my post car and I think I am happy with the match. It has a dull matte look if you just spray it without any clear. I do not believe it is supposed to create any shine or glare.