Examine source code of Blended Calligraphy

{
  "theme": {
    "images": {
      "theme_frame": "Fx_Persona_Header.jpg"
    },
    "colors": {
      "frame": "#ebe5df",
      "tab_background_text": "#524b45"
    }
  },
  "version": "2.0",
  "name": "Blended Calligraphy",
  "manifest_version": 2,
  "description": "I created this theme to get something looking great with my GNOME-Design. I'm using Blended (  <a href=\"https://outgoing.prod.mozaws.net/v1/3b5f5a3f5878e8c61389dfaa41891adb27121e05440764a2f1066c2af16c93b2/http%3A//gnome-look.org/content/show.php%3Fcontent=26050\" rel=\"nofollow\">http://gnome-look.org/content/show.php?content=26050</a>  ).\nI wanted a nice background gradient including my main window color #EBE5DF to get a smooth look all over the window."
}