Examine source code of Unadorned Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Tranquil Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(9, 64, 114)",
      "toolbar_text": "rgb(231, 233, 235)",
      "frame": "rgb(14, 19, 56)",
      "tab_background_text": "rgb(197, 205, 213)",
      "toolbar_field": "rgb(13, 6, 70)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(144, 169, 204)",
      "popup": "rgb(8, 17, 43)",
      "popup_text": "rgb(190, 202, 207)",
      "tab_loading": "rgb(144, 169, 204)"
    }
  }
}