Examine source code of Alaska6

{
  "theme": {
    "images": {
      "theme_frame": "alaska_sunrise_01051.jpg"
    },
    "colors": {
      "frame": "#991473",
      "tab_background_text": "#911689"
    }
  },
  "version": "2.0",
  "name": "Alaska6",
  "manifest_version": 2,
  "description": "twilight"
}