Examine source code of Midnight Pentagrams

{
  "theme": {
    "images": {
      "theme_frame": "flarepentlargeheader.jpg"
    },
    "colors": {
      "frame": "#6d07b5",
      "tab_background_text": "#ba79fc"
    }
  },
  "version": "2.0",
  "name": "Midnight Pentagrams",
  "manifest_version": 2,
  "description": "Dark pentagrams with shining star in the center"
}