One of my favourite things about Sinners is the use of colour to symbolize belonging and home vs assimilation or separation from self and the environment.
When Annie is in her home, connected to her ancestors by practicing Hoodoo and speaking Yoruba to the man she loves , her skin tone blends into the earthy, natural tones of her home. Who she is, is not at odds with her environment . She even wears the same deep blue as Smoke
When Sammie is singing the blues, filled with passion and surrounded by the love and joy of his community, his shirt matches the warm yellow glow of the lights in the Juke Joint. He fits in perfectly and effortlessly
Delta Slim is the embodiment of The Blues, every part of him is harmonious with the dark brown walls of the Juke Joint
In contrast, the church walls and the clothing of the congregation reflect the assimilating influence of whiteness to the land and people, the false binary of black and white. The pop of green of the wild, natural world beyond the stark walls stands out as a symbol of freedom and untamed passion. There is no warmth or vibrancy in this place that demands Sammie give up his music, his voice, his culture.
And this split dividing the twins is interesting to me. Stack shown with the open air behind him, foreshadowing his eventual escape and freedom from the Jim Crow South. His red hat, tie and car reflecting the blood spilled and his vampirism as the only means he has for leaving this world of division.
Then Smoke on the right is shown contained within the Juke Joint, his home and his metaphorical casket as this will be his final resting place with Annie. His blue hat and shirt are symbolic of the sky/spirit world where he will spend eternity, unnaturally separated from his brother