Which color is most commonly used in horror film marketing materials to trigger psychological tension and fear?

The film industry has mastered the art of visual marketing through strategic color choices in posters, trailers, and promotional materials. Different genres often leverage specific color palettes to trigger emotional responses and set audience expectations. This trivia question explores how major studios use color psychology in their marketing campaigns to maximize box office performance and audience engagement.

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Red - symbolizing blood, danger, and heightened emotions
Blue - creating a sense of isolation and coldness
Green - representing the supernatural and toxicity
Purple - suggesting mystery and the unknown