Examine source code of Purple 11

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple 11",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(62, 27, 70)",
      "toolbar_text": "rgb(215, 112, 248)",
      "frame": "rgb(185, 142, 201)",
      "tab_background_text": "rgb(170, 122, 183)",
      "toolbar_field": "rgb(42, 21, 49)",
      "toolbar_field_text": "rgb(186, 123, 204)",
      "tab_line": "rgb(197, 112, 248)",
      "popup": "rgb(39, 21, 44)",
      "popup_text": "rgb(155, 98, 183)",
      "ntp_background": "rgb(50, 17, 59)",
      "tab_loading": "rgb(197, 112, 248)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f3ce8b7-e3fb-485a-aafa-7f9fa498bd8e}"
    }
  }
}