Examine source code of Ubuntu Orange

{
  "theme": {
    "images": {
      "theme_frame": "ubuntu-orange-3.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Ubuntu Orange",
  "manifest_version": 2,
  "description": "This is an orange themed Ubuntu persona, suits the Orangeness of Ubuntu nicely, with a touch of yellow to remind you of sunshine. Especially useful if you live in a basement."
}