A closer look

Back in the day, purple dye was so obscenely expensive because it was extracted from rotting sea snails that royalty literally outlawed commoners from wearing it. By the time artificial purple was invented in the 19th century, most countries had already picked their flag colors. Only Dominica, featuring a parrot, and Nicaragua, flexing a tiny rainbow, arrived late enough to the sovereign party to slap the forbidden hue on their banners.