Not directly linked to MediaWiki, but steps to reproduce:

• Visit https://fr.wikipedia.org/
• In your personnal common.js, add:

mw.loader.load( "/w/index.php?title=Utilisateur:Arkanosis/xpatrol.js&action=raw&ctype=text/javascript" );
xpatrolEnablePurge = true;
xpatrolWatchMain = true;
xpatrolWatchOthers = true;

• Visit the history of a page with Minerva, example: https://fr.m.wikipedia.org/w/index.php?title=Wikip%C3%A9dia&action=history
• See that dynamic inputs added are dark

The gadget would need rework anyway, but these inputs shouldn't be dark when using light color scheme. Might be linked to T358059.