If your Computer screen color changing automatically then
- check your Power Supply Cable and data cable to the monitor, Whether there is any Loose contact – replace the cable
- Check your display settings. Right click on the desktop and go to Personalize display settings. Try to Adjust the Screen resolution, Calibrate color and refresh rate. Check the display drivers.
- Don’t keep Speakers near to the monitor that may damage your screen. Also update your video card drivers.
- Try to keep your PC virus free.