Warm color series: red, yellow and orange can make people feel comfortable and excited; The series of cool colors such as cyan, gray and green make people feel quiet and melancholy; White and black are the two poles of vision. Studies have confirmed that black can distract people and make them feel depressed and bored. Living in such an environment for a long time, people's pupils are extremely dilated, their expressions are dull and they feel numb. Over time, it will adversely affect people's health and life expectancy. Offices are all white and clean, but the contrast of white is too strong, which is easy to stimulate pupil contraction and induce headache. According to the different visual and psychological feelings of color, scientific application of color will help people's lives and patients' rehabilitation. In the room of patients with chronic diseases, using warm colors makes people feel happy. Help restore health; In the room of patients with heart failure, it is advisable to arrange quiet light green or light blue to avoid letting them see exciting red.