In this section site background, it includes site background colour and site background image option.
Click on Dashboard> Appearance> Customize> Site Background
Start customizing site background.
If you set the background colour. It will be visible at the background.
Click on Select Colour and choose the colour you want to set at the background of your web page.
Background image is visible at the behind of the web page.
To set background colour click on the select background image and upload the image. While uploading, image shape and size should be considered.