Examine source code of city

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "city",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(179, 136, 19)",
      "frame": "rgb(70, 70, 70)",
      "tab_background_text": "rgb(202, 202, 202)",
      "toolbar_field": "rgba(255, 255, 255, 0.1)",
      "toolbar_field_text": "rgb(202, 202, 202)",
      "tab_line": "rgb(202, 202, 202)",
      "popup": "rgb(34, 35, 41)",
      "popup_text": "rgb(254, 254, 254)",
      "tab_loading": "rgb(202, 202, 202)"
    }
  }
}