Blue and red are colors of France, while red and yellow are colors of Spain, reflecting Andorra's status as a co-principality between the two. The coat of arms features symbols of the Bishop of Urgell, the Count of Foix, Catalonia, and the Viscounts of Béarn.
History
The tricolor was adopted in 1866. Before that, the flag was just yellow and red. The coat of arms was officially standardized in 1993.
Construction
A vertical tricolor of blue, yellow, and red with the national coat of arms centered in the yellow band. Ratio is 7:10. The yellow band is slightly wider than the other two.