Completely Remove Greyout Color

Is there a way to totally remove the greyout color? When I have the opacity all the way down there is still a slight tint.

You can see it here.It’s very slight but noticeable on some monitors.

If all of your page background colors are the same, could you make the Greyout color the same color as your page background color? I think that would make it almost invisible compared to the white