Examine source code of Kangaroo

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_Kang.jpg"
    },
    "colors": {
      "frame": "#001c54",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Kangaroo",
  "manifest_version": 2,
  "description": "Kang as in Kangaroo.  This theme sticks to being simple with just a little jumping fun."
}