I have had to add color-scheme to the meta elements to advise browsers that this site responds whether the browser supplies black-on-white or white-on-black, and also go beyond that, at least in Firefox which allows user to specify a foreground, background and link, visited colours, for example, with javascript links to set similar stuff with just the foreground and background, overrides for hyperlink, visited and hover colours were not found:
This allows the site also to respond to lighting conditions of the user.
Because of this, blending of the browser chosen text colour with an accent, needed the use of the relatively new in css terms color-mix(in srgb, currentcolor, #888);, the background colour uses the usual transparency channel to show the default at the document root.
It might be nice that the browser lets the user theme of chrome, or edge, background show on the webpage if the website does not overrule it, especially when the background-color property of the CSS :root, html, and body items is transparent.
The browser security policy prohibits the website make direct reference to any "internal" url, so there is not any workaround, it is limited to the new tab pages or something:
This site is intended to respect accessibility by not often overriding the 1em font size, specified by the user-agent.