Examine source code of Smokey Forest

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Smokey Forest",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(34, 55, 41, 0)",
      "toolbar_text": "rgb(178, 251, 227)",
      "frame": "rgb(49, 82, 60)",
      "tab_background_text": "rgb(120, 202, 145)",
      "toolbar_field": "rgba(34, 55, 41, 0)",
      "toolbar_field_text": "rgb(178, 251, 227)",
      "tab_line": "rgb(178, 251, 227)",
      "popup": "rgba(34, 55, 41, 0.5)",
      "popup_text": "rgb(176, 255, 229)",
      "ntp_background": "rgb(38, 56, 43)",
      "ntp_text": "rgb(178, 251, 227)",
      "toolbar_field_border": "rgba(34, 55, 41, 0)",
      "toolbar_field_separator": "rgba(34, 55, 41, 0)",
      "toolbar_top_separator": "rgba(34, 55, 41, 0)",
      "tab_loading": "rgb(178, 251, 227)"
    }
  }
}