Related: LGBTQ Flags (and their meanings) Up until that point, a pink triangle had symbolized the gay rights movement, Baker explained in his memoir, Rainbow Warrior: My Life In Color. He came up with the design after prominent gay rights leader Harvey Milk urged him to create a new, positive symbol that the entire LGBTQIA+ community could rally behind. The rainbow Pride flag was designed in 1978 by artist and gay rights activist Gilbert Baker.
