Out of interest, I enabled a preview of the newly added light/mode for one of my sites (thanks Patrice, great job!).
With dark mode enabled, I had a look at the right sidebar and realized that we don't really have a dark display here:

@chalin: can you please have a look and check whether we can alter the background and text color of the tags used here? AFAICS, the tags remain unchanged in dark mode which doesn't really give a great user experience here! Thanks!