Examine source code of ITG (Dark)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "ITG (Dark)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(39, 42, 50)",
      "toolbar_text": "rgb(214, 215, 217)",
      "frame": "rgb(39, 42, 50)",
      "tab_background_text": "rgb(214, 215, 217)",
      "toolbar_field": "rgb(65, 69, 78)",
      "toolbar_field_text": "rgb(214, 215, 217)",
      "tab_line": "rgb(65, 69, 78)",
      "popup": "rgb(214, 215, 217)",
      "popup_text": "rgb(39, 42, 50)",
      "icons": "rgb(214, 215, 217)",
      "tab_selected": "rgb(39, 42, 50)",
      "tab_text": "rgb(214, 215, 217)",
      "toolbar_bottom_separator": "rgb(39, 42, 50)",
      "toolbar_field_border": "rgb(39, 42, 50)",
      "toolbar_top_separator": "rgb(39, 42, 50)",
      "tab_loading": "rgb(65, 69, 78)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e960114-281e-4ec3-b70c-ca29944d590c}"
    }
  }
}