Flag of Andorra

This national ensign is composed of three vertical bands in blue, yellow, and red, with the central yellow stripe being slightly wider than the outer two. Centered within the middle band is the national coat of arms, which features a detailed shield topped by a crown. The design is specified with an official aspect ratio of 7:10.

The combination of colors represents Andorra's unique position as a co-principality, merging the blue and red of France with the yellow and red of Spain. Within the shield, the miter and crozier denote the Bishop of Urgell, and the three bars represent the Count of Foix. The four bars of Catalonia and the cows of the Viscount of Béarn are also included to commemorate the historical feudal lords of the territory. These elements collectively reflect the medieval charters that established the dual sovereignty still defining the nation today.

Andorra officially adopted this tricolor design in 1866, moving away from the horizontal red and yellow bicolor used in previous centuries. Historical accounts attribute the addition of the blue stripe to Napoleon III, who sought to incorporate French colors alongside the traditional Spanish hues. While the basic arrangement has persisted for over 150 years, the coat of arms underwent minor graphic refinements in 1993 to coincide with the country's entry into the United Nations. This modernization ensured the flag met international standards for diplomatic representation.