Cool tones in color coordination refer to hues that are associated with calmness and are typically found in nature. These include blue, green, and purple shades. They are often used in interior design and fashion to create a serene and tranquil atmosphere. In art, cool tones can evoke a sense of depth and are often used to depict scenes with a distance or coolness. In marketing and branding, cool tones can convey a sense of trustworthiness and professionalism.