No you can't change the wheel colours unless you specify in the Tesla settings what size wheels you have. In car my wheels show up as the old style 19" wheels but in the app they are the new style.Do you mean you can change the color of each of the wheels, or just change the wheels?
In the car the aero wheels with cap kit are the right color (dark grey) but in the app they are silver.
I wish the lugs were also black not bright silver.
Sorry that screen shot was a bit misleading. I took it when I first realised they had changed but now are back to alloy I was really only trying to highlight the change in the headlights.