Website should honor prefers-color-scheme when JavaScript is disabled

[simevidas]

I prefer light themes. In my desktop browser, CSS prefers-color-scheme matches light. I also have JavaScript disabled by default.

When I visit https://openwebdocs.org/, I get a dark theme instead. When I enable JavaScript and reload the page, I get a light theme. I shouldn’t have to enable JavaScript to get the theme that I want. prefers-color-scheme is a CSS signal.