Examine source code of A Dark Night

{
  "theme": {
    "images": {
      "theme_frame": "DarkNightv2.jpg"
    },
    "colors": {
      "frame": "#050000",
      "tab_background_text": "#190069"
    }
  },
  "version": "2.0",
  "name": "A Dark Night",
  "manifest_version": 2,
  "description": "A Dark but Beautiful Night Sky"
}