Examine source code of Midnight 16:00

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Midnight 16:00",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(72, 72, 72)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(49, 49, 49)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(49, 49, 49)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(65, 65, 65)",
      "popup": "rgb(72, 72, 72)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(43, 43, 43)",
      "ntp_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(65, 65, 65)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2ca52a96-e8f2-45ec-8e0a-970b754d2fb7}"
    }
  }
}