Sidney Poitier became the first African-American to win an Academy Award for best actor.
He won for his role in Lilies of the Field (he had also been nominated for best actor for The Defiant Ones five years earlier), and though it was a tremendous breakthrough in terms of diversity, it’s also worth noting that when Ann Bancroft gave him a kiss on the cheek when presenting him with the Oscar, some people were offended.
That was the world in 1964, the world in which Poitier and everyone else of color lived. Whatever accomplishments they enjoyed did not erase the reality of racism that surrounded them.