Hello @solidarityapoth,
Thanks for writing to us.
To add the background color in the sidebar you can use this custom CSS code under Theme Option —>CSS
.x-sidebar .widget {
background: #ffffff;
padding: 10px 10px;
}
Please feel free to change the padding and color value as per your design.
The purpose of providing custom CSS is to show you how to add CSS code to your site. Writing custom CSS is outside the scope of our theme support. If you need more customization, you need to learn CSS and learn how to use the browser’s element inspector or you subscribe to One where customization questions are answered.
Hope it helps.
Thanks