Examine source code of Grey Sophisticated

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Grey Sophisticated",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.24)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(61, 69, 68)",
      "tab_background_text": "rgb(183, 183, 183)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgb(200, 194, 171)",
      "tab_line": "rgb(148, 142, 120)",
      "popup": "rgba(38, 38, 38, 0.58)",
      "popup_text": "rgb(186, 186, 186)",
      "icons_attention": "rgb(111, 109, 102)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(70, 70, 70)",
      "ntp_text": "rgb(197, 197, 197)",
      "sidebar_text": "rgb(170, 170, 170)",
      "sidebar": "rgb(70, 70, 70)",
      "tab_background_separator": "rgba(61, 27, 229, 0)",
      "tab_selected": "rgba(48, 54, 48, 0)",
      "toolbar_bottom_separator": "rgba(61, 69, 61, 0)",
      "toolbar_field_border_focus": "rgb(86, 86, 86)",
      "toolbar_field_border": "rgba(68, 68, 68, 0)",
      "toolbar_field_focus": "rgba(54, 54, 54, 0.71)",
      "toolbar_field_highlight": "rgba(145, 136, 136, 0.71)",
      "toolbar_field_separator": "rgba(186, 186, 186, 0)",
      "toolbar_top_separator": "rgba(148, 142, 120, 0)",
      "tab_loading": "rgb(148, 142, 120)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4abb2160-04b7-4386-bf02-c76892023818}"
    }
  }
}