Rainbows make me stop and smile. Since the year 1000 scholars understood these brilliant colors arrive due to sunlight bent or refracted by water drops. Many people persist in believing rainbows bring wealth or a bridge to heaven, however. By 1704, Sir Isaac Newton proved white light is made up of all the colors in the rainbow. The earliest people in Colorado, the Ute Indians, worshipped Mother Earth and Father Sky. Naturally they believed rainbows were a powerful sign from above.