Examine source code of Darcula

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Darcula",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(44, 39, 55)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(27, 24, 42)",
      "tab_background_text": "rgb(185, 194, 205)",
      "toolbar_field": "rgb(55, 48, 68)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(99, 86, 124)",
      "popup": "rgb(44, 39, 55)",
      "popup_text": "rgb(215, 226, 239)",
      "popup_highlight": "rgb(117, 100, 154)",
      "sidebar_highlight": "rgb(117, 100, 154)",
      "sidebar": "rgb(55, 48, 68)",
      "toolbar_field_highlight": "rgb(156, 142, 226)",
      "tab_loading": "rgb(99, 86, 124)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e7fb35c-6378-4bba-b439-be4ff80a56d1}"
    }
  }
}