Flag of Thailand Thailand Flag Meaning The flag of Thailand , commonly known as the “Trairanga” or the “Tricolor,” consists of five horizontal stripes. The stripes are colored red, white, and blue, and their arrangement holds deep symbolic meaning related to Thailand ’s history, culture, and national identity. The flag was officially adopted on September 28, 1917, during the reign of King Rama VI. The five stripes in the flag represent the unity and strength of the nation, with the ... The tricolor flag of Thailand (thong trai rong) features five horizontal stripes with the colors red, white, and blue. The central blue stripe is wider than the rest. This design was adopted in 1917 after a royal decree and has remained the official national flag of Thailand since then. Learn about the history, design and meaning of the Thai flag , which has five horizontal stripes of red, white, blue, white and red. See also the royal navy flag , the flag of Siam and the flag of Thailand in different periods. The National Flag of Thailand features five horizontal bands of red (top), white, blue (double width), white, and red; the country uses Thai baht as its official currency; and its national anthem is Phleng Chat Thai (" Thai National Anthem")