The Flag of South Korea
The flag's background is white, a traditional colour in Korean culture. White was common in the daily attire of 19th-century Koreans, and it still appears in contemporary version of traditional Korean garments, such as the hanbok. the colour represents peace and purity. The circle in the middle is derived from the philosophy of yin-yang and represents balance in the universe. The red half represents positive cosmic forces, and the blur half represents the opposing negative cosmic forces. Together the trigrams represent movement and harmony as fundamental principles. Each trigram represents on of the four classical elements, as described below: