Mister cooks Shug Avery a breakfast of grits, biscuits and ham, and takes it to her room. She throws the breakfast against the wall. The breakfast leave a bright yellow and bright red stain on the wall. There was nothing on the tray that could have left those colors on the wall.
The character of Sofia is played by Oprah Winfrey. Sofia marries Harpo, as well as the fact that 'Harpo' is 'Oprah' reversed, 'Harpo' is also the name of Oprah Winfrey's production company.