Setting a custom background color or image in Corporate is easy. Simply hop into your Customizer, locate the Colors section, and set your Background color. You can also set a custom background image in the Background image section of your Customizer.
The default background color of the theme is #444444. When a custom background color or background image is chosen, additional padding is added around your web site at all times. In mobile views 5 pixels of padding is added; in tablet views 10 pixels is added; and in desktop views 20 pixels is added.