I did that on my first car, too. My '67 LeMans. If you recall the Rally II wheels in the '70s and '80s, on some cars Pontiac had painted the inner portion of the wheels the color of the car and painted the "spokes" silver. Others, however, were simply black or dark gray with silver spokes. I wasn't sure which I liked so I did one side graphic red/silver and the other black/silver. No one really noticed except to tell me that the red/silver made the car look like a "circus wagon". So I eventually painted those black, too.....
Jim