Examine source code of Spring 2013

{
  "theme": {
    "images": {
      "theme_frame": "spring2013.jpg"
    },
    "colors": {
      "frame": "#06c296",
      "tab_background_text": "#006bc9"
    }
  },
  "version": "2.0",
  "name": "Spring 2013",
  "manifest_version": 2
}