Electron Highlighter Syntax is a dark UI and syntax theme for VS Code. This started as the official[1] VS Code port of my Electron Highlighter syntax theme for Atom, but I have since switched to using VS Code as my main editor so it's no longer really a "port".
[1] I hesitate to say my theme is popular enough to have an "official" port to another editor, but someone did make a theme and claim that it was a port of my Atom theme and frankly it was not great, so this is just to clarify that this is the only extension that I'm endorsing as part of this little ecosystem of themes I've made.