Examine source code of Blueberry Pie

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blueberry Pie",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(158, 118, 186, 0.65)",
      "toolbar_text": "rgb(84, 84, 84)",
      "frame": "rgb(171, 129, 199)",
      "tab_background_text": "rgb(231, 242, 244)",
      "toolbar_field": "rgba(189, 170, 198, 0.53)",
      "toolbar_field_text": "rgb(231, 242, 244)",
      "tab_line": "rgb(181, 145, 197)",
      "popup": "rgb(231, 242, 244)",
      "popup_text": "rgb(84, 84, 84)",
      "tab_loading": "rgb(181, 145, 197)"
    }
  }
}