Not my idea ... but we need something simple ... worn every day to be able to recognize each other. Not a uniform but a method to stand with good by one piece of dress.
I've been making paracord bracelets for my family and friends. I have tons of cord and I get the plastic buckles at Hobby Lobby for cheap. I even have my batty mother-in-law wearing one. My mom asked me what they are for, and I (only half-jokingly) told her "So we can recognize each other when the revolution comes".
Just had an idea. How 'bout a simple black ring band with a slogan engraved on it. "Come And Take It", perhaps.
I first thought about going with yellow, but that looks too much like gold. Not sure what you'd make it out of either, besides anodized aluminum.