[sovit ranjitkar]

@CindieCag To add a light-grey background-color for the right sidebar section Go to Appearance -> Theme Option -> Design Option Tab -> Custom CSS and paste the following CSS code:

#secondary {
    background-color: #e0e0e0;
    padding: 2%;
    width: 27.28%;
}
@media only screen and (max-width: 1078px) {
        #secondary {
	   width: 96%;
	}
}

Note: TO change color of your choice change above HEX color code e0e0e0 with your own HEX color code

Thank you for using our theme.

Now, Click on Save All Changes Button and Refresh your browser.