Before Config tiddler title for default light & dark palette (e.g. $:/config/palette/default-dark) fixed
You can use About | Tiddlywiki Switch Theme | Userscripts | OpenUserJS to auto switch palette (not theme, sorry for the name) to you preferred palette, and is based on your current color scheme.
After install, you can try open https://links.tiddlywiki.org/ and see if it becomes white. (Or open https://tiddlywiki.com/ in dark scheme to see it in dark mode automatically)