AnotherPomodoro is still being worked on and one of the features that brings it closer to 1.0 is dark mode.
The pull request was already merged into the development branch. After some polish and refactoring it will be available as part of the 0.10 release. I was surprised to see how hassle-free it was to implement a dark mode using TailwindCSS.
Check out AnotherPomodoro at https://another-pomodoro.netlify.app!