Examine source code of Canvas-a2

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Canvas-a2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0.41)",
      "toolbar_field": "rgba(255, 255, 255, 0.78)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(255, 138, 163)",
      "popup": "rgb(55, 68, 74)",
      "popup_text": "rgb(220, 203, 255)",
      "tab_loading": "rgb(255, 138, 163)",
      "bookmark_text": "rgb(206, 178, 255)",
      "frame": "rgb(33, 75, 100)",
      "tab_background_text": "rgb(255, 126, 139)"
    }
  }
}