A contrast that I personally like for the black-on-black sport cars is black wheels with a 1/4" thick RED stripe + RED calipers and of course,
30% tinted windows. Looks bad boy.... signed "not a girl's car". This could work well with your gunmetal gray CGT style projectors.
If you want a perfect balance (looking at from front-end), go for gunmetal gray wheels. For info, the projectors' bezel you are most likely to go for will have the same color as on the wheels on this picture.
You could go a notch further and go for black wheels, red stripe/calipers, and RED bezels for your projectors. There you'd have a true turn head Porsche for sure
