Color issue in full screen mode?
Ranger, Warrior, Guardian
Here is direct comparison of the color change;
Ranger, Warrior, Guardian
Full screen uses a different color settings, you can even notice that by the fact that Screen Gamma is only enabled when in full screen. And that’s it, try to test different Screen Gamma values and see if it helps.
Also, I see you took a photo of your screen and that’s is good to see what you see, but if you could take a screenshoot (pressing Print Screen) it would be good, then we could see if it’s something with the game or your monitor.