Pale pastel yellows are seen as childlike. Amber yellows are perceived as mellow and warm. Vivid yellows are seen as active, ebullient, enthusiastic and vigorous. In Japan, yellow often represents courage. In China, adult movies are referred to as yellow movies. In Russia, a colloquial expression for an insane asylum used to be "yellow house." Bright “marigold” yellow may be associated with death in some areas of Mexico. Those condemned to die during the Inquisition wore yellow as a sign of treason. A yellow patch was used to label Jews in the Middle Ages. European Jews were forced to wear yellow or yellow “Stars of David” during the Nazi era of prosecution. Color plays a vitally important role in the world in which we live. Color can sway thinking, change actions, and cause reactions. It can irritate or soothe your eyes, raise your blood pressure or suppress your appetite. When used in the right ways, color can even save on energy consumption.