Source from: https://github.com/dempfi/ayu
A simple theme with bright colors and comes in three versions — dark, light and mirage for all day long comfortable work.
Note that this isn't a theme maintained by the original Ayu theme author so please report issues related to this theme here.
ext install ayu
Then go to
Preferences > Color Theme > Ayu Light(or Ayu Dark, or Ayu Mirage).
If you want to setup File Icon, then go to
Preferences > File Icon Theme > Ayu.
Update themes and build VSIX package
npm run build && npm run package