Do you feel anxious in a yellow room? Does the color blue make you feel calm and relaxed? Artists and interior designers have long believed that color can dramatically affect moods, feelings, and emotions. "Colors, like features, follow the changes of the emotions," the artist Pablo Picasso once remarked.

Color is a powerful communication tool and can be used to signal action, influence mood, and even influence physiological reactions. Certain colors have been associated with increased blood pressure, increased metabolism, and eyestrain.

So how exactly does color work? How is color believed to impact mood and behavior? 

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