The African Union flag is composed of a broad green horizontal stripe at the top followed by a narrow band of gold. Below is a broad white stripe bearing the Emblem of the African Union at its center followed by a narrow gold band and broad green stripe at the bottom.
Symbolic significance:
The color green symbolizes African hopes and aspiration to unity.
The gold color stands for African wealth and bright future.
The color white represents the purity of Africa's desire to have genuine friends throughout the world.
External Link
The text above was modified from the African Union's site.