5 April 1998 Green, black, and red are the Garvey colors, after Marcus Garvey, a civil rights movement leader. However, the colors were adopted by an international assemblage of 25 countries of the African diaspora, thereby making the colors international. International African Flag, The African Flag, Pan African Flag, Liberation Flag, Black Flag, African American Flag, Afro-American Flag and others. Yes, the colors were hoisted first in the United States and, it represents all peoples of the African Diaspora regardless of land of birth.
Rasta colors are the Ethiopian colors of green, gold and red.
The UNIA-ACL knew that Africans at home and abroad needed their own flag as other flags around the world could not represent the collective of African people. The question of a flag for the race was not as trivial as might have appeared on the surface, for in the United States especially, the lack of an African symbol of nationhood seems to have been cause for crude derision on the part of whites and a source of sensitivity on the part of Afro-Americans. My understanding is that Marcus Garvey was thinking of contemporary Ethiopia, which in the 1920's was the only African country that had never been colonized. I found another Afro-American flag while surfing the web. I have never heard of this one.