Examine source code of Ambiance gradient

{
  "theme": {
    "images": {
      "theme_frame": "HEADER.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#bababa"
    }
  },
  "version": "2.0",
  "name": "Ambiance gradient",
  "manifest_version": 2,
  "description": "Ambiance gradient also for libreoffice 4.0"
}