The flag of Guyana comprises a green field with a black fimbriated red triangle starting on the hoist side of the flag and sitting within a larger white fimbriated yellow triangle, both pointing toward the fly side of the flag. This design was officially adopted as the national flag of Guyana on 26 May 1966 following the country gaining its independence from the United Kingdom. The flag of Guyana is known as the "Golden Arrowhead". The flag was designed by American vexillologist Whitney Smith; however, the fimbriations were additions later made by the College of Arms in the United Kingdom. The flag's ratio is 3:5.
The colours of the flag of Guyana hold various symbolism - green recalls the country's vast forests and fields, yellow is symbolic of mineral wealth, red denotes the people's dynamism and zeal in building the nation and for reform.