Hi,
The visual details can usually be tweaked with custom styling. If by white area you’re referring to the main content container, the CSS for that should be:
article.hentry, body:not(.blog):not(.page-template-template-blog):not(.archive):not(.search) #container:not(.bravada-landing-page) .main, body.bravada-boxed-layout:not(.bravada-landing-page) #container {
background-color: rgba(255,255,255,0.5);
}
Adjust the values as necessary.
The accent color is used in multiple spots and places and in various ways. These uses were not necessarily designed to look identical.