I don't know the solution to this but if you are having problem ONLY in your wallpaper(like mine which had kind of a brownish tint) you can either close the dark mode or go to the dark mode settings and stop it from applying it to you wallpaper

Thanks, my display didn't have a problem, my wallpaper looked normal in photos but when I made it my wp it had some brownish tint on it, so the only problem was with the dark mode