The flag of Spain consists of three horizontal bands: red on the top and bottom and a wider yellow band in the center. On the left side of the yellow stripe, there is Spain’s national coat of arms. The colors have historical significance: Red and yellow were traditionally associated with the Spanish kingdoms of Castile, León, Aragon, and Navarre. The coat of arms includes symbols representing Spain’s regions, as well as the Pillars of Hercules on either side with a banner that reads "Plus Ultra" (Latin for "More Beyond"), symbolizing exploration and the vast Spanish influence across the seas. This flag design has been official since 1981, though it was based on earlier flags used by the Spanish navy in the late 18th century.