Colors invoke different responses in the brain and may affect your mood. Many therapist actually use what it called "Color Psychology" as a part of their treatment. According to "Very Well Mind", "Red was used to stimulate the body and mind and to increase circulation. Yellow was thought to stimulate the nerves and purify the body. Orange was used to heal the lungs and to increase energy levels. Blue was believed to soothe illnesses and treat pain. Indigo shades were thought to alleviate skin problems."
https://www.verywellmind.com/color-psychology-2795824
How can I use colors to relieve my stress?
The best way to do this is to use paint. You don't have to be an artist to utilize paints, crayons, and markers! If you take ten minutes out of your day and use calming colors – stay clear of reds, go for blues and purples – you can create a more soothing environment for yourself. Many people purchase coloring books or coloring apps to partake in "chromotherapy", or the use of colors for stress prevention.