1. Capitalize “B” when referring to Black people because Blackness is a culture; a community; a way of communicating; etc, we are NOT a color which isn’t capitalized “I colored the cat black”
2. I choose NOT to capitalize “white” unless it’s at the beginning of a sentence because, outside of its connection to white supremacy, whiteness is a made up construct where who’s “white” shifts politically
https://www.ap.org/ap-in-the-news/2020/ap-says-it-will-capitalize-black-but-not-white