What is the best code syntax highlighting extension/setting?

Anyone else uses Flarum for programming related community?

I think I have the default dark theme + default syntax highlighting, and it does not look good at all. Some data is dark blue and barely visible:

Can anyone recommend a dark theme that works better, or a better/different extension for good code highlighting?

Thanks!

I am looking for a better highlighting. As close as possible to something like this: