Examine source code of Dark Mode Navi

{
  "manifest_version": 2,
  "version": "3.4",
  "name": "Dark Mode Navi",
  "author": "Massao",
  "theme": {
    "colors": {
      "frame": "rgb(6, 3, 13)",
      "frame_inactive": "rgb(6, 3, 13)",
      "tab_text": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(233, 240, 246)",
      "tab_line": "rgb(247, 36, 82)",
      "tab_loading": "rgb(247, 36, 82)",
      "toolbar": "rgb(20, 17, 26)",
      "toolbar_top_separator": "rgb(20, 17, 26)",
      "toolbar_bottom_separator": "rgb(20, 17, 26)",
      "toolbar_vertical_separator": "rgb(20, 17, 26)",
      "toolbar_text": "rgb(247, 36, 82)",
      "toolbar_field": "rgb(20, 17, 26)",
      "toolbar_field_text": "rgb(211, 216, 219)",
      "toolbar_field_border": "rgb(20, 17, 26)",
      "toolbar_field_separator": "rgba(20, 17, 26, 0.4)",
      "toolbar_field_focus": "rgb(20, 17, 26)",
      "toolbar_field_border_focus": "rgb(211, 216, 219)",
      "button_background_hover": "rgba(211, 216, 219, 0.15)",
      "button_background_active": "rgba(255, 255, 255, 0.20)",
      "icons": "rgb(247, 36, 82)",
      "bookmark_text": "rgb(170, 170, 170)",
      "popup": "rgb(20, 17, 26)",
      "popup_text": "rgb(250, 250, 250)",
      "popup_border": "rgb(20, 17, 26)",
      "popup_highlight": "rgb(247, 36, 82)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(6,3,13)",
      "ntp_text": "rgb(247, 36, 82)",
      "sidebar": "rgb(20, 17, 26)",
      "sidebar_text": "rgb(233, 240, 246)",
      "sidebar_border": "rgb(20, 17, 26)",
      "sidebar_highlight": "rgb(247, 36, 82)",
      "sidebar_highlight_text": "rgb(233, 240, 246)"
    }
  }
}