What is the main psychological effect of using cool colors in a space?

Promoting relaxation

Cool colors, such as blue and green, often evoke feelings of calm and serenity. They have the power to transform a space and influence our state of mind by promoting an atmosphere of relaxation and reflection. This ability of colors to affect our perceptions and emotions is utilized in interior design, where cool color palettes are chosen to create environments conducive to relaxation. For example, hospitals often use these hues to calm patients. Cool colors can also decrease the perception of ambient temperature, making them ideal for warm climates.