Color changing glitching Mac screen

Try and restart the Mac to see if the issues persist.

If they persist, boot your Mac in the safe mode to see if they persist there. If they persist in the safe mode, it is most likely a hardware error. If they don't persist in safe mode, it is caused by an external piece of software, you might want to evaluate the software you've installed to your Mac.

1. On your Mac, choose Apple menu  > Shut Down.
2. Wait for your Mac to shut down completely. A Mac is completely shut down when the screen is black and any lights (including in the Touch Bar) are off.
3. Press and hold the power button on your Mac until “Loading startup options” appears.
4. Select a volume.
5. Press and hold the Shift key, then click Continue in Safe Mode.
6. The computer restarts automatically. When the login window appears, you should see “Safe Boot” in the menu bar.

If the issues persist, Contact - Official Apple Support to set up hardware service for your device