Examine source code of new 2015

{
  "theme": {
    "images": {
      "theme_frame": "big_header7_twitter.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#15e83c"
    }
  },
  "version": "2.0",
  "name": "new 2015",
  "manifest_version": 2,
  "description": "really good"
}