The method of personalizing the color of the editor gutter in VS Code is as follows:
- Open VS Code and go to the settings page (File > Preferences > Settings or press Ctrl + , on Windows or Cmd + , on Mac)
- In the search bar, type "editor.gutter" and select "Editor: Gutter".
- Under "Editor: Gutter", you can change the background color of the gutter by selecting "Background" and choosing your desired color.
- You can also change the color of the line numbers by selecting "Foreground" and choosing your desired color.
- Once you are done customizing the editor gutter colors, click on "Save" to apply the changes.
Note: You can also customize the gutter colors using a theme extension or by editing the theme's JSON file directly.