>>24
I'm no web designer, I only modified a couple of colors in the default.css file, taking inspiration from what the (ungoogled)chromium addon Dark Mode was rendering. I have a friend who's losing his sight and oddly enough he can only see web pages in low contrast settings. I always thought it was some kind of a hipster trend. He's not visiting the site but I made it thinking of him.
If you overwrite default.css with dark.css the site will be dark by default. But really the stylesheet should be the responsability of the user, like the display fonts and even the whole browsing experience (there are userscripts that change that already and the best browser IMNSHO is an Emacs mode)
Also note that there's no limit to the number of stylesheets you can add. the query ?style=foo will fetch foo.css and the query string ?style=whatever will fetch whatever.css/
The SchemeBBS draft included the possiblity to post your own CSS file in code blocks in a regular thread and use that. It has yet to be implemented, I went timeout and had to cut non vital features, back then.
I will add other preferences that were planned though, like the optional header inlined thread list so that an instance can have the complete look and feel of good ole 2channel if a user wants that.
I want to leave the default as it is(*). SchemeBBS was supposed to look almost unnoticeably different from a site without CSS at all. That's in the official specs from the SchemeBBS consortium along with: no cookies, no Javascript, compatiblity with HTML 2.0 and html5, no <DIV> (don't ask why), get the same identation and look in text-mode browsers like elinks, no clutter for screen readers for blind people, no class attributes (failed at that one), HTML source as human readable as possible, and so on...
(*) But I began to use dark.css on the web browser myself so there's a chance I change my mind soon.