They didn't even allow black members until some time in the late 70s.
Just for clarification, it was actually the 'priesthood' that was denied to people of color until 1978, when lo and behold, God (aka 'Heavenly Father') revealed to 'the prophet' that it was now time for the ban to be lifted.
Because of the Elijah Abel story, though, they're going to adamantly deny their racist roots.
In the 1970s U.S., there was significant social and economic pressure to eliminate the Mormon Jim Crow laws. In addition, they were trying to expand in South America and as you know, many South Americans are darker than I am. In order to keep the converts coming, they had no choice but to extend all the 'blessings' to each 'worthy'
male in the church, regardless of color.