How can you command attention with so many colorful images around the world? Some activists have learned that they can gain popularity by connecting their movements to a color like yellow, red, blue or green. This month, French demonstrators wore “yellow vests” to block highways from Provence to Normandy. They rioted in Paris and left French President Emmanuel Macron struggling to meet their demands. All French drivers must carry a yellow vest in their cars in case they have car trouble. The drivers launched their protest against a proposed increase in fuel taxes wearing the vests. To the protesters, the vests represent a troublesome government demand. So they used the vests to express their anger over high taxes and other financial difficulties. The vests can be seen easily at night and at roadblocks around France.