Jamaica's Flag Colors: Not Unique

No. Red, white, and blue are among the most common flag colors globally. Dozens of nations use this triad, including the United States, United Kingdom, France, Russia, Netherlands, Australia, New Zealand, Chile, Costa Rica, Cuba, Dominican Republic, Panama, Paraguay, Philippines, Thailand, and many more. Jamaica's flag (gold diagonal cross on green and black) is distinctive precisely because it does not contain red, white, or blue.