What does yellow on the flag of Angola Africa represent?

In the flag of Angola, yellow symbolizes the country's wealth, particularly its Natural Resources, including minerals and oil. The flag features a horizontal split of red and black, with a yellow emblem of a machete, a cogwheel, and a star, which together represent the struggle for independence and the hope for a prosperous future. The yellow color thus plays a vital role in conveying the nation's aspirations for economic development.