Examine source code of paper plane

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "paper plane",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(205, 218, 221, 0.42)",
      "toolbar_text": "rgb(32, 93, 161)",
      "frame": "rgb(175, 237, 230)",
      "tab_background_text": "rgb(38, 5, 77)",
      "toolbar_field": "rgba(248, 251, 251, 0.5)",
      "toolbar_field_text": "rgb(76, 35, 99)",
      "tab_line": "rgb(66, 51, 118)",
      "popup": "rgb(186, 218, 235)",
      "popup_text": "rgb(64, 35, 92)",
      "tab_loading": "rgb(66, 51, 118)"
    }
  }
}