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The flag of Jamaica was adopted on 6 August 1962 (Jamaican Independence Day), the country having gained independence from the British-protected Federation of the West Indies. The flag consists of a gold saltire, which divides the flag into four sections: two of them green (top and bottom) and two black (hoist and fly). It is currently the only national flag that does not contain the colors red, white, or blue.

Source: Wikipedia