Remove “Background Image” Filter

Hello,

The way my Hestia site is setup, the background image fills the screen but it has a dark gray overlay on it. When I scroll down on the home page, the background image is stationary but the overlay scrolls with the page and looks quite goofy. I would also simply like to lighten up the background image as the one I like is somewhat dark.

I am looking to remove this overlay entirely, make it transparent.

Regards

The page I need help with: [log in to see the link]