Diagonal black band edged in gold running from lower hoist to upper fly, with green in the upper-hoist triangle and blue in the lower-fly triangle. Green for natural vegetation; gold for the country's mineral wealth; black for the people; blue for the Indian Ocean, lakes and rivers. Adopted on June 30, 1964 after the union of Tanganyika and Zanzibar to form Tanzania. Practise the Tanzania flag in the Flagzio Africa flag quiz across all eight game modes.