Examine source code of January Cold

{
  "theme": {
    "images": {
      "theme_frame": "JanuaryColdH3Custom.jpg"
    },
    "colors": {
      "frame": "#02556e",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "January Cold",
  "manifest_version": 2,
  "description": "blue, clouds, cold, cyan, frost, ice, lake, reflection, sky, trees, winter, brush, season,frosty, My wallpaper to match is at: <a href=\"https://outgoing.prod.mozaws.net/v1/c9b5d6c743cc0972ed7f4effdef73a8a2ad34541152a36f75c716331b541a641/http%3A//nature.desktopnexus.com/wallpaper/927500/\" rel=\"nofollow\">http://nature.desktopnexus.com/wallpaper/927500/</a>"
}