I have the same problem that was mentioned earlier, but the topic was closed without anyone sharing the resolution.
I am trying to make the background of blockquotes match the background of the theme. They are defaulting to some white or gray color right now.
I have added the changes to ATO>Blockquotes and Blockquotes in Blockquotes styles.
Here is what I put for both:
color: #42834e;
padding: 1em 1em;
background: #c9f7b0;
Wordpress is just not recognizing this change no matter how many times I save and refresh the page.