Which color is most commonly used on thriller/suspense book covers by major publishing houses to create a sense of danger and intensity?

Book covers are powerful marketing tools in the publishing industry. Colors used on book covers are carefully chosen to evoke specific emotions and attract target readers. This poll explores how major publishing houses use color psychology in their branding and marketing strategies. Test your knowledge about how colors are strategically employed across different literary genres and bestselling titles.

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Red - for its association with blood, danger, and heightened emotions
Blue - for its calming effect that contrasts with the tense narrative
Purple - for its connection to mystery and the supernatural
Yellow - for its attention-grabbing properties and association with caution