How do I change all page background colors

My site address is http://www.covitravel.com

How do I change the site so all of the page background colors (behind the main content) are the same color as the other pages? Two of the pages are still showing a white page color behind the text:
http://www.covitravel.com/cruises/
http://www.covitravel.com/international-travel/

These are two pages where I have changed the Page Attribute's Template to: "Fullwidth Page"

Thank you

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

.fullwidth {
background: transparent;
}