The Flag of the State of Arizona has 13 rays of red and gold ( the conquistador colors and of the flag of Spain ) on the top half , representing the 13 first counties of Arizona ( there are 15 counties today ) , as well as telling of Arizona 's picturesque sunsets . 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 .