Hello,

Thank you so much purchasing our theme and contacting our support center.

Our theme color schemes are managed from the Theme Settings panel. As you can see, you can change the color for top bar, header and footer. Color for buttons, prices and other elements are grouped as a primary color and can be set in Theme Settings -> Styles & Colors.
There are a lot of content elements with a different background that can be easily managed with WPBakery page builder. We suggest you to watch video tutorials that should help you understand how to work with this page builder https://wpbakery.com/video-tutorials/

Kind Regards
XTemos Studio