Examine source code of Trails In The Volcano

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Trails In The Volcano",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 79, 0, 0.48)",
      "toolbar_text": "rgb(255, 245, 0)",
      "frame": "rgb(6, 6, 6)",
      "tab_background_text": "rgb(255, 205, 187)",
      "toolbar_field": "rgb(89, 4, 0)",
      "toolbar_field_text": "rgb(255, 238, 0)",
      "tab_line": "rgb(255, 224, 0)",
      "popup": "rgba(67, 24, 0, 0.81)",
      "popup_text": "rgb(255, 128, 0)",
      "tab_loading": "rgb(255, 224, 0)"
    }
  }
}