Taegeuk is the Korean cognate of Taiji, the Taoist concept of yin and yang, from which all is actualized. In South Korea, the Taegeuk symbol is typically portrayed in red (yang, or heaven) and blue (yin, or earth). Taegeukgi, the flag of South Korea, with a blue and red Taegeuk in the center. The Taegeuk symbol is most prominently displayed on South Korea's national flag, called the Taegeukgi (along with four of the eight Palgwae diagrams). Because of the Taegeuk's association with the national flag, it is often used as a patriotic symbol, as are the colors red and blue. A popular variant in Korea is the Sam-Taegeuk (三太極), which adds a yellow lobe, representing man, to the red and blue. The Sam-Taegeuk is frequently seen as a design on the face of fans.