Unable to Change Weebly Blog Comment Colors

I am having a similar issue to this person: https://csscreator.com/topic/blog-comment-heading-font-color-weebly-site

The difference is that mine is the opposite issue (font is showing up white on a white background) and my code appears different than the original question above so I was not able to reach a resolution from those instructions. For those who don't want to read the other post here is a quick summary of my problem:

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