Examine source code of Green Book

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Green Book",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-005-f5f3cf677b1f132c75ddc7bd319dd1fc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(115, 200, 155)",
      "toolbar_text": "rgb(44, 27, 12)",
      "frame": "rgb(58, 159, 105)",
      "tab_background_text": "rgb(181, 245, 207)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(211, 181, 52)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(168, 207, 186)",
      "popup_text": "rgb(96, 43, 6)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  }
}