What does color do? And give an example.

Color can produce visual effects on light through eyes, brain and our life experience. People's perception of color is not only determined by the physical properties of light, for example, people's perception of color is often affected by the surrounding colors. For example, a function of the following colors: 1. Orange: it produces vitality, induces appetite, contributes to the absorption of calcium, and is conducive to the recovery and maintenance of health. 2. Yellow: It can stimulate the nerves and digestive system and strengthen logical thinking. 3. Green: beneficial to digestion, promoting body balance, and can play a calming role. 4. Purple: It can inhibit the motor nerve, lymphatic system and heart system, and can maintain the balance of potassium in the body.