The Power of Color
      
         
          |  | Red 
              is an engaging and emotive color. Best for restaurants. It is considered 
              more disturbing by anxious subjects, and more exciting to calm subjects. 
              Triggers the pituitary and adrenal glands and releases adrenaline. 
              May increase blood pressure and breathing, and stimulate appetite 
            and sense of smell. | 
         
          |  | Yellow 
              is the first color a person distinguishes in the brain. Associated 
              with stress, caution, and apprehension, yet it stimulates an overall 
            sense of optimism, hope, and balance. Excellent for use in classrooms. | 
         
          |  | Orange 
              has the characteristics halfway between red and yellow. It is one 
            the best colors for stimulating learning. | 
         
          |  | Blue 
              is the most tranquilizing color. It calms tense subjects and increases 
              feelings of well-being. When you see blue, your brain releases eleven 
              neurotransmitters that relax the body, and may result in a reduction 
              of temperature, perspiration, and appetite. Blue may be a bit too 
            calming for most learning environments. | 
         
          |  | Green 
              is also a calming color. In response blood histamine levels may rise 
              resulting in reduced sensitivity to food allergies. Antigens may be 
            stimulated for overall better immune system healing. | 
         
          |  | Brown 
            promotes a sense of security, relaxation, and reduces fatigue. | 
         
          |  | Gray 
            is the most neutral color. | 
         
          | Dark 
            Colors lower stress and increase feelings of peacefulness. | 
         
          | Bright 
              Colors such as red, orange, and yellow spark energy and creativity. 
            They can also increase aggressive and nervous behavior. | 
      
      For optimal learning, choose yellow, light orange, beige, or off-white. 
      Those colors seem to stimulate positive feelings.
      
 
      Source: Walker, Morton. 1991. The Power of Color.