Flags of the Yugoslav socialist republics were defined by each of its six constituent republics. The flag of the socialist republic was hung together with the flag of the SFRY on national holidays and other special occasions.
The individual flags of the six Yugoslav socialist republics were as follows:
The flags were based on old historical flags of Yugoslav constitutive nations, which mostly used the pan-Slavic colors, red, white and blue. They were all embellished by a communist symbol, the red star. The Macedonian and the Bosnian flag didn't exactly follow this pattern: the flag of the Macedonian republic was newly created and made to consist of a simple red flag, another symbol of communism, with the red star outlined in yellow. As for Bosnia, because of its mixed nationalities, its flag consisted also of a red flag but with a small Yugoslav flag in the upper-left corner.
See also