A quick way to do this would be to go to > Customize > Additional CSS and adding the following code:
.inside-article{background-color: lightgrey !important;}
Change it to your own color, of course. You can also grab the precise color Hex value from a websites such as Color-Hex.
I hope this helps.
You don’t have to purchase premium to customize your Theme. Fortunately, you can get a lot done using CSS and PHP. The simplest way would be to hide the Metadata in CSS.
In > Customise > Additonal Settings add
.entry-meta {display:none;}
You can also add this snippet using the Simple CSS plugin.
