Cool colors are hues that evoke a sense of calm and tranquility. They typically include shades of blue, green, and purple. These colors are often associated with nature, such as the sky and water, and can create a soothing atmosphere in various settings, from homes to art. In design and art, cool colors can help to recede or create depth, making spaces feel larger and more open. They are frequently used in interior design to promote relaxation and are popular in landscaping to enhance the natural beauty of gardens and outdoor areas.