Red, Green, Yellow and Black flags of the world
    Ghana, Guinea-Bissau, São Tomé and Príncipe and Vanuatu have red, green, yellow and black colors in their national flags
    Ghana flag

    Guinea-Bissau flag

    São Tomé and Príncipe flag
     São Tomé and Príncipe

    Vanuatu flag

    World Flags - Page 44 of 66
    Flags of the World