@jdb You can add the following code to your .sidebar
–
.sidebar {
background: #fff;
padding: 20px;
}
I don’t know the exact line of your css since it looks like you’re using a plugin to minify your code, so if you’re unable to find it you can just add the code above in your css.
The background can be changed to whatever color you want. I added the padding so it will give you some space around the widgets so they aren’t on the edge.