The flag of the state of Arizona consists of 13 rays of red and weld-yellow on the top half, the colors of the flag of Spain, representing the 13 original states. The red and yellow also symbolize Arizona's picturesque sunsets. The copper star represents the copper mining industry in Arizona. The rest of the flag is colored blue, representing liberty.
Officially, the State of Arizona website, museum and official materials cite the following origins of the Arizona flag: "Charles Wilfred Harris, Colonel in the Arizona National Guard, served as the captain of the unit’s rifle team in 1910. During the rifle competition at Camp Perry, Ohio, the Arizona team was the only team without an emblem of any kind. Colonel Harris was chiefly responsible for the creation of the rifle team flag that in 1917 became the Arizona State Flag. Blue and gold are the colors of Arizona. Red and gold are the colors carried by Coronado’s Expedition of 1540 to the Seven Cities of Cibola. The blue is “liberty blue” identical to the color in the United States flag field of stars. Since Arizona is a western state the rays of the setting sun seemed appropriate. There are thirteen rays representing the original “thirteen colonies.” The large copper star identifies Arizona as the largest producer of copper in the United States. "On February 27, 1917, the legislature passed the bill to adopt this flag as the official Arizona State Flag despite dissenting votes and Governor Campbell’s refusal to affix his signature to the bill."