The General Assembly adopted an official seal and emblem for the organization. The UN emblem depicts in silver against a light blue background a map of the earth, projected from the North Pole, and encircled by two symmetrical olive branches. It is a slight modification of a design selected by the US Office of Strategic Services for buttons used at the San Francisco Conference in 1945. The particular shade of blue is now officially called United Nations blue. The emblem is used only for UN publications and conferences and other officially approved purposes.
The first UN flag was used in Greece in 1947 in a region where there was fighting. The flag has the UN emblem in white against a background of United Nations blue.
The flag may be displayed not only by the UN and the specialized agencies and by governments but also by "organizations and individuals to demonstrate support of the United Nations and to further its principles and purposes." It is considered "especially appropriate" to display the UN flag on national and official holidays; on UN Day, 24 October; and at official events in honor of the UN or related to the UN.