1. Low saturation and cool tones: Cool blue is usually low in saturation, showing a soft and unobtrusive color, making people feel relaxed and calm. 2. Visual coolness: This blue has a distinct coolness, like a breeze or a clear winter sky, making people feel fresh and clear. 3. Rationality and restraint: Cool blue conveys an atmosphere of rationality and self-discipline, symbolizing calm thinking, inner balance and the ability to control emotions. 4. Tranquility and depth: This blue gives people a deep feeling, like the color of the night sky or the sea, with the characteristics of relaxation and contemplation.