I can fix that if you make a github issue highlight where you experience issues. I understand that I'm sorry for the inconvenience. The color options are for the "Custom" theme I will make this more clean in a future version of the extension.

Edit: The color options will only be visible when the theme is set to “Custom” in the next release. Regardless, I’d still like to understand the source of the black font that’s making the text unreadable. I am committed to resolving this issue as quickly as possible, and your satisfaction is my top priority. I hope these fixes will positively impact your review.