Examine source code of Ubuntu Black Dust

{
  "theme": {
    "images": {
      "theme_frame": "ubuntu_black_dust_header.jpg"
    },
    "colors": {
      "frame": "#636363",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Ubuntu Black Dust",
  "manifest_version": 2,
  "description": "A black dust theme with Ubuntu logo. Like the others compatible with the Vertical Sidebar addon."
}