I can honestly say (and it’s about the only thing I am grateful to JWs for) that becoming a JW completely cured me of racism. Before that I was a typical young white, London born, English Nationalist who hated all black people and wanted them all repatriated.
However, years later I did find it a bit odd that the black presiding overseer of a neighbouring congregation that was predominantly black, was reportedly having issues of racism from white servants in that congregation. I heard that from the presiding overseer of my congregation, and a few years after that, the black presiding overseer stepped down, declining to become an elder when that system was introduced in the early 70s.
I also found it odd when the engagement of a white brother to a black sister was announced, an older black sister commented that they shouldn’t be marrying each other because mixed marriages invite difficulties, and they were just bringing unnecessary troubles down on their own heads. I didn’t take that as racism, but I did think she should keep those sort of thoughts to herself.