Examine source code of Last Unicorn

{
  "theme": {
    "images": {
      "theme_frame": "lastunicornheaderfinal2.jpg"
    },
    "colors": {
      "frame": "#8c0a65",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Last Unicorn",
  "manifest_version": 2,
  "description": "This is part of a pastel by artist Heidi Hanson depicting the myth The Last Unicorn"
}