In many diverse cultures blue is significant in religious beliefs, brings peace. The cool, calming effect of blue makes time pass more quickly and it can help you sleep. A natural color, from the blue of the sky, blue is a universal color.
In 1999 Pantone named the sky blue color of Cerulean as the color of the new millennium. Almost everyone likes some shade of the color blue. It can be strong and steadfast or light and friendly. Calm and Cool is the Nature and Meaning of Blue.