Meet "Toothless"...I got kids!
Without seeing pics and just based on your description I'd say it's normal. There is always a slight difference between the bumper cover and quarter because it's paint on plastic vs metal respectively. It should be nearly imperceptible especially on a dark color car, so u may be noticing it now but it was the same out of the factory. If you look at every car now you'll notice a slight variance in color between their plastic bumper covers and the fenders/quarters.Can anyone tell me if they see a variance in color between their rear bumper and the quarter panels? In direct sunlight? In the shade there's not much difference, but in the sun, totally different thing.
Just got my bumper replaced and repainted and the color isn't a perfect match in the sun, don't remember if from factory there was a color difference or not between the two.
As much as they wanted to repaint the quarter panels to blend the paint, I refused, but now wondering if I should have gotten it done...