If they are burnt, they are burnt. No fix for led screens, ıt could be easily fixed with lcd though(picture now attached) I started to see a blue tint (like a vertical line on the left hand side) on my screen after I switched to aquarios 8. I switched back to lineage os but the screen damage is still there. Taking a screen shot does not capture the color. It is something in the hardware. Any ideas.
Order a new LCD if it bothers you. You could always just live with it. Google is your friend when it comes to changing out the screen, tons of tutorials on YouTube,(just search screen replacement for your model and presto).