Plone Community Forum dark theme?

Any chance the community forum could get a dark mode? There's some 'documentation' on how this is doable over on the Discourse forum:

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I noticed there's now a dark theme available, thank you to whoever made this addition so swiftly!

https://community.plone.org/u/YOUR_USERNAME/preferences/interface

I played around yesterday, but where not able to find the place to set it for the user. Now I found I had to save my interface settings once, then the option appears.