Not to step on toes here, but if you paint them black, they disappear under the car, only my opinion. I think the Aero Blue is a bright enough color they will show up. But then I recommend silver to match the trim on the rest of the car. They are molded in a charcoal color.

For what it is worth. James

PS Duplicolor makes a silver wheel paint I used that will match the trim fairly close. Over the silver I used clear. If you go Aero Blue, you may have to have them professional painted to match and that raises the cost considerably.