It seems like the Nitro gray falls smack in the middle of the two gray colors they offer.I would go with black on my boat mainly because it would match the black pins on the hull. You cant really see the pins all that great in that photo but i have silver and black pins. Plus black would look pretty good with the red.
I dont regret putting this one on one bit, it dosent look bad the color it is. I just would have perfered it to match. Overall its a pretty awesome product. Most of the lakes i go to dont have docks so i end up beaching a lot and have really put it to the test. It has held up great, it hardly has a scratch on it.