What is one of the primary colors of the U.S. flag?

The primary colors of the U.S. flag are red, white, and blue. Blue, as one of these primary colors, is prominently featured in the flag, representing vigilance, perseverance, and justice. The blue field in the top left corner contains the stars, which symbolize the states of the union. Understanding the significance of these colors provides insight into the values and heritage represented by the flag. While green, purple, and orange are not associated with the U.S. flag, they do not hold any connection to the symbol or its representation within American culture.