The message of the flag is the phrase "where the sun rises for all". In the middle of the flag is the golden yellow sun, with its rays symbolically targeting to the future of the state. The sun is placed on a white band, where the white color represents peace. The blue in the upper left and the yellow in the bottom right represent the waters and the soil of the state. The colors date back to a flag used by the Autonomous Government of Palmas in the 19th century.
The flag was adopted with the state flag law (law no 094/89) of November 17, 1989.