When people see the LGBT flag knows that those calls decades ago 'gay colors' symbolize a movement that knows no borders and that remains harshly persecuted and repressed in many countries of the world. Join us to discover Why the Rainbow is the LGBT flag, what each color means and the variations it suffered since it became an international symbol. It is a beautiful image that filled the void felt by members of the gay community at the end of the 20th century of a recognizable symbol. With 4 decades in tow it goes beyond national borders and unites people from all countries. The rainbow flag It is one of the most recognizable symbols in the world.