Examine source code of A Night Outside

{
  "theme": {
    "images": {
      "theme_frame": "Outside-Header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#f7e545"
    }
  },
  "version": "2.0",
  "name": "A Night Outside",
  "manifest_version": 2,
  "description": "A view of the outside landscape!"
}