Couple of thoughts.....
....In photos with flash - they look a medium gray, almost bright....They are not.
The color of the wheels is more accurately represented in distance photos. Like this...
It's a deep, dark, gunmetal gray. Metallic effect, too...
However, they are NOT black...if that's where your heart lies.
It's an expensive paint job, chosen by the designer to afford the car a little more of an "premium" look than last generation. And, boy, it works...especially when paired with an exposed CF hood vent.