Content Background is transparent – should be WHITE

I’m at a loss. I’ve recreated this website twice and even did a complete fresh install on a different domain and this problem keeps happening. My content and footer are now transparent when they should have a white background. I have very few plugins and I deactivated all of them and reactivated them one at a time and this problem is still there. It happened when I simply changed the content text color from a light gray to a darker gray. That is all I did and the white background went away. I have not idea why this is happening. Can anyone help???

Thank you, I’m desperate.

Website is: http://www.wingsoffreedomanimalrescue.org/public_html/