🌌 Midnight Lights is an original dark blue theme for Visual Studio 2019 and 2022. If you're looking for something even darker, try my new theme ⚫ Midnight Deep.
After installing the extension, the theme will be available in the dropdown under Tools -> Theme or Tools -> Options -> General.
This is my first theme and you will probably find some quirks. This is a personal project, feel free to fork the repository and tweak it however you like.