Colour Psychology 104: The Psychological Effect of Yellow 🟨 "In the world of safe hues, like black, red and white, yellow shouts: Look at me. I'm happy!" — Joy Sewing. Yellow is the colour of the mind and the intellect. It represents learned wisdom and corresponds to the left or logical side of the brain. It activates our mental faculties and promotes mental agility and perception. As such, the colour yellow is often described as uplifting and illuminating, representing:⁠ Hope Happiness Cheerfu