Question Faint horizontal line

[stevo1354]

Recently while playing games I noticed a faint light line near the bottom of my monitor. No clue what to do next about it
Monitor: acer gn246hlb (144 hz one)

... Since I cant show a picture (cause of how complicated it is. Not letting me paste in a gyazo)
Its basically a rly faint white line which is perfectly horizontal and is about two inches long near the bottom left of my screen

 

[stevo1354]

The line isnt visible while the background is black or white but is visible when its blue oe red or any other colour