The colors on the Uruguay flag represent the Andes snow and clear blue skies. They were based on the Argentine national flag's colors, which are also light blue and white, but Uruguay flag's design is based on the United States' flag.
The Sun of May, which is the yellow sun with a human face on the Uruguay flag, symbolizes the Independence of Uruguay from Spain. The sun is said to have broken through the clouds on May 25, 1810 when Uruguay gained its independence. The sun on the flag has 16 rays, which are wavy to triangular. The nine stripes of light blue and white on the flag represent the former nine departments of the country.