Blue is by far the most popular color - conveying peace and tranquility, harmony, trust and confidence. It causes the opposite reaction as red. Peaceful, tranquil tranquil blue causes the body to produce calming chemicals, helping you channel calmness from within. According to a scientific study, children prone to aggressive behavior become calmer when placed in a blue classroom.
While that may be an extreme example, if your household needs some harmonious tranquillity, why not try a soft blue in the areas where tempers fray, and see if it helps create a calmer atmosphere. Blue has also been shown to reduce crying in babies, and may even help them sleep.