This extension completely resets syntax highlighting, so you can assign your own colors starting from scratch.
Make changes
Open File > Preferences > Color Themes and pick clear-code-dark theme.
To find out the language grammar markers, open the file with the language you need and call the Inspect TM Scopes command from the command palette (Ctrl+Shift+P or Cmd+Shift+P on a Mac).
To tune the editor's syntax highlighting colors, use editor.tokenColorCustomizations in your user settings settings.json file like: