The forum software
used to support viewing the forum in multiple themes, with only the "Dark Fantasy" theme (set as the default) and whatever was the "upstream" default (I don't remember the theme's name) as your two choices. But I now can't find the place where one could switch themes. It was probably somewhere in the User Control Panel (click "UCP" in the bar at the top, to the left of "Chat"), but I've just searched through that to no avail.
Failing that, most Web browsers nowadays support (directly or via an extension or addon of some kind) "user styles," and someone with a little CSS expertise could create one that would increase the contrast on this site.
(I also recommend you take the survey linked from
this thread, in the Announcements room, and mention your concern there, to make sure a higher-contrast design gets on the administrators' list.)
