There is a close relationship between the effect of color and the human psyche. Color psychology is the study of how colorful colors affect human behavior, mood, or physiological processes. Colors are thought to influence our shopping choices, emotions, and even our memories. Color psychology is a relatively new field of study that faces several challenges. A major problem that arises when examining this issue is determining how to measure the effects of color. Understanding color is very subjective, because different people have different ideas about colors and react to them. There are several factors that affect the perception of color, making it difficult to determine whether color alone affects our emotions and actions. Factors that affect color perception include age, gender, and culture. When examining the effect of colors on the human psyche and human emotions and behaviors, all factors should be considered the same.