Color psychology is not pseudoscience ù it is rooted in cognitive associations built up over a lifetime of cultural exposure. Red means urgency in the West; in China, it means luck. Context always shapes meaning.
CTAs and the Contrast Principle
Your call-to-action button does not need to be red or orange ù it needs to stand out from its surrounding context. A green CTA on a red page will outperform a red CTA every time.