Hello, over the past couple days I've been seeing on my screen. The outlines of things like the home button and apps button on my LG G6 stay on my screen when I'm looking at a dark gray image. It's gotten worse and I can now see outlines on the sides of my screen with things like snapchat, my keyboard etc. It's just on the sides, bit at the top and bottom only on the outside about a cm and a half in. I tried having a look around but I cannot for the life of me remember what this sort of thing would be called. I have tried simple things such as restarting the phone, uninstalling apps and changing around with the screen settings (comfort viewing mode and things like that, britness etc) but nothing seems to be fixing it. This only shows up on darker gray backgrounds, things like YouTube, discord and anything with a dark them is very badly effected. The phone is still in the 2 year contract, no screen replacements, no repairs previously done. Is this a permanent thing, can it be fixed?
Many thanks