Examine source code of Raining Color by MaDonna

{
  "theme": {
    "images": {
      "theme_frame": "RainingColorsH.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Raining Color by  MaDonna",
  "manifest_version": 2,
  "description": "Designed by MaDonna\n\nMy wallpaper to match is at: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/bd495a42438b939225e173838a5758238baba2ce0569a297f09e9ad9fd4a2dfd/http%3A//abstract.desktopnexus.com/wallpaper/1114966/\">http://abstract.desktopnexus.com/wallpaper/1114966/</a>"
}