| Flag | Country | Notes | Details |
|---|---|---|---|
![]() | Yemen | Horizontal tricolour: red, white, black | Three equal horizontal bands of red (top), white, and black, with no emblem of any kind. Adopted in 1990 upon the unification of North and South Yemen, the design follows the Arab Liberation flag colours but omits green — the colour used by both predecessor states' flags — leaving a plain tricolour. Red represents the unity achieved through struggle, white represents a bright future, and black represents the dark past being left behind. The palette is exclusively red, white, and black. |
![]() | Egypt | Horizontal tricolour (civil flag, no eagle) | Three equal horizontal bands of red (top), white, and black. The state flag places the golden Eagle of Saladin at the centre of the white band, but gold introduces a fourth colour, so the plain civil tricolour — used since the design's adoption in 1984 — is the strict qualifier here. The colours derive from the Arab Liberation flag of the 1952 revolution: red for the struggle against British rule, white for a bloodless future, and black for the oppressive past. |
![]() | Trinidad and Tobago | Red field, white-edged black diagonal band | A red field crossed diagonally from the upper hoist to the lower fly by a black band edged in white. Adopted in 1962 upon independence from Britain, the diagonal represents unity and the dawn of a new era, while the colours symbolise the elements: black for the unity and strength of the people and the wealth of the land, white for the sea and equality, and red for the warmth and vitality of the sun and the people's courage. The palette is exclusively red, white, and black. |
Notable exclusions & edge cases — why they don't straightforwardly qualify: