Does your site has a sidebar and you want to change its background color? Here is a way on how to do it using CSS tweaks in Canvas.
Canvas Child theme
Step 1 Login to WordPress control panel
Step 2 Provided that you have already uploaded a Canvas Child folder containing style.css and functions.php files in the themes folder using FTP. Go to Appearance > Editor
Step 3 Enter the following codes in Canvas Child style.css file. Please take note to change the last line to your desired color. In this tutorial, we will use skyblue.
Theme Name: Canvas Child
Description: Child theme for the Canvas theme
Author URI: http://www.jezweb.com.au/
background: url(“imageurl”) repeat scroll 0 0 skyblue;
note: We are using a Canvas child theme so that your CSS settings will not be changed if there is an update with the main canvas theme.
Step 4 Click Update File then go to your online site. You should see the sidebar with a skyblue background color.
Here is a video tutorial on how to add background color in your sidebar using CSS tweaks in Canvas