English filmmaker Emerald Fennell is opening up about the powerful symbolism behind the striking use of red in her adaptation of 'Wuthering Heights'. In a recent interview, Fennell described the colour red as 'fatal', explaining that the story itself is tragic and emotionally devastating, both for its characters and its audience. She said the film needed an 'arterial channel' running through it, visually reinforcing themes of passion, doom, and destructive love.