Examine source code of Melbourne Sunset

{
  "theme": {
    "images": {
      "theme_frame": "melbourne_sunset.jpg"
    },
    "colors": {
      "frame": "#615b5b",
      "tab_background_text": "#dedada"
    }
  },
  "version": "2.0",
  "name": "Melbourne Sunset",
  "manifest_version": 2,
  "description": "Melbourne, Australia summer sunset"
}