There is a single flag matching these criteria: Flag of Zambia.
Orange in Flags
Orange is less common in flag design but carries strong cultural meaning where it is used. It often represents courage, sacrifice, or the sun. In Ireland, orange signifies the Protestant community, while in India it symbolizes courage and sacrifice as part of the saffron band. The Netherlands historically associated orange with the royal House of Orange. Flags with orange stand out for their vibrant and energetic appearance.
Black in Flags
Black in flags often conveys strength, determination, and resilience. It can also symbolize mourning, remembrance, or the struggle of a people. In some African nations, black represents the heritage and identity of the people. Historically, black has also been associated with resistance or defiance. Flags like those of Kenya, Angola, and Estonia use black as a bold statement of endurance and pride.