Despite any gloomy connotations, research has long shown that when it comes to personal color preference, blue is the clear international winner. (It’s favored even in China, where red symbolizes luck and fortune.) There’s no surprise there—blue has an impressive reputation for producing feelings of relaxation and calmness, happiness and comfort, say researchers at the University of Georgia in their 2004 study “Relationship Between Color and Emotion.” “Blue is restful and can give us feelings of peace and serenity,” says McLeod, claiming the color can help balance the thyroid and lower blood pressure. Even governments have noticed blue’s calming effect: In 2000, after blue street lighting was introduced in Glasgow, Scotland, to improve the look of neighborhoods, the number of crimes decreased. In 2005 when blue lights were introduced in areas of Nara, Japan, crime in the blue-illuminated neighborhoods went down nine percent.
Who knows? Switching to a blue plate may even help you lose weight: Because the colour is rare in nature and often signifies something poisonous, blue is thought to be a natural appetite suppressant.