Red star on a red field. The flag of Vietnam also has a yellow star on a red field. North Korea's Red Star operating system takes its name from the communist red star. Socialist countries in Africa also incorporated the red and/or gold star into their heraldry. This practice was also adopted by countries that were formed following decolonial national liberation struggles, which often involved Marxist organizations. Transnistria and the Luhansk People's Republic are proto-states located in Eastern Europe. Due to their historical association with the Soviet Union, they have adopted socialist imagery including the red star into their flags and heraldry.
Flag of Portland, Oregon Flag of Portland, Oregon The city flag of Portland, Oregon, consists of a green field on which is placed a white four-pointed star (a truncated hypocycloid) from which radiate blue stripes, each bordered by L-shaped yellow elements. Narrow white fimbriations separate the blue and yellow elements from each other and from the green background. The official ordinance specifies a height of 3 feet and a length of 5 feet. City ordinance 176874, adopted September 4, 2002, designates the design and its symbolism. Green stands for "the forests and our green City"; yellow for "agriculture and commerce"; blue for "our rivers".