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The flag of the U.S. state of New Mexico consists of a red sun symbol of the Zia people on a field of gold (yellow), and was officially introduced in 1925. It was designed in 1920, to highlight the state's Native American Pueblo and Nuevo México Hispano roots. The colors evoke the flags of Habsburg Spain (the Cross of Burgundy), Spain and the Crown of Aragon, brought by the conquistadors. It is one of four U.S. state flags not to contain the color blue (the other three being Alabama, California, and Maryland). It is the only one of these four not to contain the color white. The flag of the District of Columbia also has no blue, although it is partially white, making the New Mexico flag the only US flag with no blue or white.

Source: Wikipedia