Examine source code of Marrakech & Atlas

{
  "theme": {
    "images": {
      "theme_frame": "Marrakech.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Marrakech & Atlas",
  "manifest_version": 2,
  "description": "Storks on the roofs of Marrakech and then mountains of the High Atlas"
}