Examine source code of Etched Starburst

{
  "theme": {
    "images": {
      "theme_frame": "EtchedStarburst.jpg"
    },
    "colors": {
      "frame": "#1c1c1c",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Etched Starburst",
  "manifest_version": 2,
  "description": "For those who dislike clutter. Also for those who like clutter."
}