Hello:
Thank you for your information. I can overwritte all the widget areas with some background color and keep the widget area (Home Feature 3 in my case) with the parallax effect. But, the picture of the parallax still set up as the background so still showing it at the areas of the body of every page. If I set up at the CSS the body with some background color with !important note, then also overwrittes the Home Feature 3 with the parallax, so I can´t figure it out how to solve the problem. The link I provided you is online, please check it out when you have some time.
Thank you.