The flag 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 the Colorado River.
The flag was adopted on February 17, 1917, by the 3rd Arizona Legislature. It was passed into law without the signature of Governor Thomas Campbell. The governor did not officially state his reasons for taking no action on the bill.
In a 2001 poll conducted by the North American Vexillological Association, the Arizona flag was identified as one of the "10 best flags on the continent," ranking sixth of 72 North American flags for overall design quality.