Basic survival- fight or flight. Used when visual impact is important. Encourages joyfulness, lightness, movement, physical enjoyment. Wrong shade can create a sense of physical deprivation. Increases critical judgment.
Right shade can work to lift spirits.
Good for mature minds, hospitalized. Used with caution when dealing with emotionally fragile people. Refreshing and restorative. Cool, refreshing, calming, soothing. Helps with tension, nervousness.