Have you ever looked at the South Korean flag and wondered if there was any meaning behind the red and blue circle surrounded by four blocks of black stripes?
The symbol in the middle represents the famous Yin and Yang and, indeed, it also stands for balance on the South Korean flag.
As with any flag, the South Korean flag incorporates several different meanings. The white background signifies brightness, peace and love.
The color red represents the positive and blue the negative. The four so-called trigrams stand for the four elements of nature: sky/wind, earth, water and fire.
SOURCE: www . scribblelive . com/blog/2013/09/25/flags-of-the-world/