Hi @JVik4 and Happy Tuesday!
Thanks for sharing this on the HubSpot Community!
I’d suggest adding an upvote and a comment on this similar Idea (that Karsten shared, thanks!) " Night mode ".
In the meantime, you could use the workaround from @JGershgorin (thank you!) which is using the “Dark reader” Chrome extension.
I hope it helps!
Have a lovely day!
Bérangère