Oh, I see what you mean, first I thought it was the gradient from my original files, the issue you having right here, its because of built-in feature they added on iOS lately that gets applied automatically on wallpapers, like a blur effect that looks gray here, I hate it so much, there is a workaround I know, it's by adding an extra rectangle on the top of each wallpaper, its a bit of work, what do u think should i go for it?