Flag of the Czech Republic

The national flag of the Czech Republic consists of two equal horizontal bands of white on the top and red on the bottom. A blue isosceles triangle is positioned at the hoist side, extending from the left edge to the center of the field. The overall dimensions of the flag maintain an aspect ratio of 2:3.

White and red are the traditional heraldic colors of Bohemia, derived from the historical coat of arms featuring a silver lion on a red field. The blue triangle was added to represent the region of Moravia and to distinguish the flag from neighboring nations. These three colors together represent the Pan-Slavic movement and the historical unity of the Czech lands.

Originally adopted in 1920 by the first Czechoslovak Republic, this design replaced a simple white and red bicolor that was identical to the Polish flag. Following the dissolution of Czechoslovakia in 1993, the Czech Republic chose to retain this specific design despite a previous agreement with Slovakia not to use former federal symbols. This continuity reflects the state's claim as the primary successor to the interwar democratic republic.