Examine source code of LibreOffice Adwaita

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "LibreOffice Adwaita",
  "manifest_version": 2,
  "description": "<b>LibreOffice 4.0.0 Gnome Adwaita GTK3 Theme</b>\nThis is not a Firefox Theme! This is a persona for LibreOffice to look like a GTK3 application. Please send ideas and bugs to falkseidl@gmail.com. Currently this is only for Adwaita GTK3. If you have a themes of desire, just write an email to me with the name and a link to the theme! Caution it must be a GTK3 theme for Linux."
}