From Imagine: How Creativity Works by Jonah Lehrer

"... blue walls makes us more creative. According to the scientists, the color automatically triggers associations with the sky and ocean. We think about expansive horizons and diffuse light, sandy beaches and lazy summer days ..."

---
Lehrer, Johan. Imagine: How Creativity Works. New York: Houghton Mifflin Harcourt, 2012. p. 51-2. Print