Initially, a quote post looks like the following:
If you want to change the overlay color of the quote background, you can do it within Customize > Design customize > Colors > Third Accent Color:
However, if you want to customize the background image for a quote, you need to use one of the following snippets. Please, don't use them together!
This snippet helps you to remove the background image at all:
.blog-post.format-quote .post-thumb, .post.format-quote .post-thumb {background-image: none;}You need to add this code to Customize > Additional CSS and save changes:
This snippet helps you to use your custom background image instead of the default one.
Before adding this code, you need to add your custom image to the 'images' folder via FTP inside the theme folder wp-content/themes/olympus:
Once your image is uploaded, then, simply add the following code, replacing the 'YOUR_IMAGE' name with your image name, to Customize > Additional CSS, and save changes:
.blog-post.format-quote .post-thumb, .post.format-quote .post-thumb {background-image: url("../images/YOUR_IMAGE.png");} 