I had some difficulty changing the common path from HELP to KB after the fact even after reading the https://www.echoknowledgebase.com/documentation/kb-main-article-page-url/
Re: Accessibility with Dark Blue Theme — the text of the body is not black and it hard for me to read. The Dark blue box background is good. I had to change the body text from dary grey to black.
Yellow might be ugly for some, but I find it to readable and easier for some people that need high contrast.
The feature is called a site map (table of contents for the entire site). I don’t think that’s a good use of table of contents nor the server resources to build such a list.