Thank you so much for your reply! Regrettably, I am working on the site offline (locally), so I am unable to provide a link. However, I have double checked the settings you mentioned.
However, as an example, I can tell you exactly where I am referring to using the Demo site. I imported the demo (as per your instructions) and began to customize. All of the red color is gone from my website (since I changed the Primary Color in Customize > Colors) except for the title of the text widget on the main page. On the demo it says: “Do You Want To…” in all capitals. That is still red on my website, despite the fact that I have changed the settings. The Meet the Team and See Some Facts boxes have changed and I manually changed the red background in some of the boxes fine. No matter what, however, that title (and any new text/html widget I add’s title) stays red.
Do you have any idea why this could be?