How would a grey bonneville look with blue graphics and blue neon lights.

probably pretty good, gray is a pretty neutral color so it looks alright with just about anything. Are you thinking about an under car kit? Havent seen to much of that, it would be interesting to see if the neon bars hide well under the body on the sides...ya kno?
Nothing worse then neon under car kits where you can see the neons from 5 feet away

please god dont do graphics, you dont drive a civic.....and blue UB is illegal in most states, i would go with a color i can run on the street

i still think its ricey.

I'd stay away from the graphics, but the neons would be cool.

Check out Firedevil'* car. He has a million of em on his car.

bonnevilles are not racecars, sports cars, or silly hondas.... they are luxury vehicles, and luxury vehicles have no business with graphics.. Id leave that to the ricers buzzing around town....

In some states you can run any colors except red to the rear, amber to the sides and white to the front on the public roads which, in short, means no underbody at all. Check the laws where you're at.

you are right but MOST states do not permit Red and Blue lights under the car, as they simulate fire and police

Right. Right. My point basically is that one may not be able to run them on the public streets anyways...so what color you get might be influenced by that. If you can run them on public streets, then red and blue are out of the question. But if you can't, they might still be an option since you would only (legally) be running them on private property (at home, parking lots, etc...) and the legality of the color would no longer be an issue.

I think underbodies period are illegal in a lot of areas. As for a cosmetic mod though, it can really look good if done right.