blog comments background black

Just set up a site for my client and when someone copies and excerpt of one of her blog posts and pastes it in the comments section to add her own comment, the background turns black and is not readable. I have noticed this only happens in Chrome. Is there a setting I am missing so it doesn’t do this?

URL: https://valuingvoices.com/the-causes-and-conditions-are-right-for-sustainable-impact/

Here is a link to a screen shot of the issue happening: https://valuingvoices.com/wp-content/uploads/2013/12/black_comments_in_google_chrome.png