Red and Yellow seem to give a warm feeling, possibly because they are the colors of fire and sunlight. They give a feeling of cheerfulness, brightness, and warmth.

Blue and Green seem refreshing and cool because they are the colors of Ice, Foliage, Water, and Sky. Violets and purples give a feeling of relaxation and spirituality. Dark shades tend to be depressing.

Green and Red may be either warm or cool, depending upon whether there is more Yellow (warm) or more Blue (cool) in the Red or Green Shades.