Colombia’s war flag is listed with a proportion of 4:5.
This makes the military flag noticeably squarer than Colombia’s standard national flag, which has a 2:3 proportion. The war flag retains the Colombian tricolor: yellow across the upper half, followed by blue and red bands of equal height. It is additionally charged with a white circle outlined in red and containing Colombia’s coat of arms.
The 4:5 ratio belongs specifically to the military flag shown in Colombia’s flag specifications. It should not be confused with the naval ensign, civil ensign, or presidential flag, which use different designs or proportions. Those variants exist because Colombian law and protocol distinguish national, civil, diplomatic, naval, and military uses.
The tricolor itself has roots in the revolutionary flags associated with Francisco de Miranda and the former state of Gran Colombia. The present color arrangement was officially adopted in 1861, while later decrees regulated practical use. The war flag therefore combines the historic national colors with a military emblem and a compact field shape suited to ceremonial and institutional display.