I did mine to match, I think 20%? The shop that did it, told me that it was illegal there (AZ) and that I could get pulled over for it. I told him that the cops in my state (not AZ) weren't concerned about it (they're not). So they threw it on the front for me and sent me on my way. No tickets or comments, or even second looks yet (knock on wood). Know your state laws, but more importantly, know your states enforcement.