Countries with red, green, yellow/orange, and black flags Red, Green, Black and Yellow Flags of the World Ghana Guinea-Bissau São Tomé Vanuatu Green, Red, Black and Orange Flag of the World Zambia List of all national flags of the world World Flags by Color Combination BW BY GW RB RB RG RW RY BBY BWB BWG BWY GBY GBY GWO RBY RBY RGB RGY RWB RWB RWG WOY BBWY BGBW BGBY BGWY BGWO RBWY RWBB RBGW RBGY RBWY RGBW RGBY RGWY RGOY RBGWY RBWBY RBGWBY