Examine source code of Holo

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Holo",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.43)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(148, 138, 223)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(234, 255, 254)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(231, 255, 231)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(195, 199, 255)",
      "icons": "rgb(221, 255, 248)",
      "ntp_background": "rgb(255, 255, 255)",
      "ntp_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(255, 255, 255)",
      "tab_text": "rgba(0, 85, 51, 0.97)",
      "toolbar_top_separator": "rgba(202, 255, 244, 0)",
      "tab_loading": "rgb(231, 255, 231)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{15c71201-b5ef-46ee-a883-db68a670c428}"
    }
  }
}