Examine source code of Nujabes

{
  "theme": {
    "images": {
      "theme_frame": "Cabezal.jpg"
    },
    "colors": {
      "frame": "#5e5959",
      "tab_background_text": "#5e5959"
    }
  },
  "version": "2.0",
  "name": "Nujabes",
  "manifest_version": 2,
  "description": "Hojas de viento :)"
}