Examine source code of The 4 Elements by Doodle

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "The 4 Elements by Doodle",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.31)",
      "toolbar_text": "rgb(166, 110, 86)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(0, 0, 0, 0.33)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(34, 202, 8)",
      "popup": "rgba(0, 0, 0, 0.33)",
      "popup_text": "rgb(255, 255, 255)",
      "icons_attention": "rgb(2, 125, 170)",
      "icons": "rgba(0, 0, 0, 0.82)",
      "popup_border": "rgb(255, 255, 255)",
      "tab_text": "rgb(226, 61, 34)",
      "tab_loading": "rgb(34, 202, 8)"
    }
  }
}