Examine source code of Hogwarts at night

{
  "theme": {
    "images": {
      "theme_frame": "hogwarts.jpg"
    },
    "colors": {
      "frame": "#445bcf",
      "tab_background_text": "#a3d1fa"
    }
  },
  "version": "2.0",
  "name": "Hogwarts at night",
  "manifest_version": 2,
  "description": "Hogwarts school of witchcraft and wizardry. A picture of the castle where Harry Potter, Ron Weasley and Hermione Granger go to school."
}