Examine source code of Default Dark Cleaner

{
  "manifest_version": 2,
  "version": "1.0.5",
  "name": "Default Dark Cleaner",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "bookmark_text": "rgb(246, 248, 250)",
      "button_background_active": "rgba(127,127,128, 1)",
      "frame": "#0D0D0E",
      "icons": "#CDCDCD",
      "popup": "rgba(54,54,59, 1)",
      "popup_border": "rgba(76,76,81, 1)",
      "popup_text": "rgb(197, 197, 198)",
      "popup_highlight": "rgb(92,92,97)",
      "ntp_background": "rgb(42, 42, 46)",
      "ntp_text": "rgba(164, 164, 165, 0.8)",
      "sidebar": "rgba(56,56,61, 1)",
      "sidebar_text": "rgba(249,249,233, 1)",
      "sidebar_highlight": "rgba(67,67,71, 1)",
      "sidebar_highlight_text": "rgba(249,249,233, 1)",
      "sidebar_border": "rgba(76,76,81, 1)",
      "toolbar": "rgb(50, 50, 52)",
      "toolbar_field": "rgb(71, 71, 73)",
      "toolbar_field_text": "rgb(249, 249, 250)",
      "toolbar_field_border": "#474749",
      "toolbar_field_border_focus": "#3C73A9",
      "toolbar_field_separator": "#7E7E7E",
      "toolbar_vertical_separator": "#414143",
      "tab_line": "rgb(10, 132, 255)",
      "tab_loading": "rgb(10, 132, 255)",
      "tab_background_text": "#D3D5CF",
      "tab_background_separator": "#0D0D0E",
      "tab_text": "#FCF7F1"
    }
  }
}