Examine source code of David Tennant Dark

{
  "theme": {
    "images": {
      "theme_frame": "DTblackandwood.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "David Tennant Dark",
  "manifest_version": 2,
  "description": "David Tennant, best known for his portrayal of the Tenth Doctor in the BBC long running Sci-Fi drama show called Doctor Who."
}