Wait, how did I get here? This is a handy cheat sheet and I've never seen it before.
@Alexis My custom CSS stays fairly close to the default dark theme with some accent colours so when I run into those it usually doesn't stick out too much.
Although there are some places, in the settings sections where I don't go much, where I haven't gotten rid of the ugly mastodon blue.
I was gonna say my custom CSS is very short, but I looked and it is 119 lines which is more than I thought.