Students at Galer Elementary School take a show off their support for others like them, the military child, by sporting purple clothing or accessories during the Purple Up! For Military Kids day, April 15. Purple is the color that symbolizes all branches of the military, as it is the combination of Army green, Coast Guard blue, Air Force blue, Marine red and Navy blue. - Students at Galer Elementary School take a show off their support for others like them, the military child, by sporting purple clothing or accessories during the Purple Up! For Military Kids day, April 15. Purple is the color that symbolizes all branches of the military, as it is the combination of Army green, Coast Guard blue, Air Force blue, Marine red and Navy blue.