I suspect that this topic is state specific. In Ohio, we have two different categories of DNR--DNR comfort care, and DNR arrest. There's an interesting PDF on our state's laws concerning DNR here. https://www.odh.ohio.gov/-/media/ODH...ice/dnrfaq.pdf
. Having moved here from a state where it was very difficult to make oneself a DNR, I'm a huge fan of my state's laws.
With that being said, since we have 2 different categories, we have very specific wristbands. They are purple (which I think is a pretty universal color). We place the patient's hospital ID sticker on it, along with a DNR arrest label or DNR comfort care label.
My advice would be to first check the laws for your state. After that maybe a quick literature search, or a search of practices at large treatment hospitals in your state might give you some good ideas. Best of luck on this important initiative!