Examine source code of Brave Incognito

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Brave Incognito",
  "theme": {
    "colors": {
      "toolbar": "#3d2841",
      "tab_line": "#3d2841",
      "tab_text": "#f3f3f3",
      "bookmark_text": "#ffffff",
      "frame": "#1b0e2c",
      "frame_inactive": "#322641",
      "tab_background_text": "#ffffff",
      "toolbar_field": "#241834",
      "toolbar_field_text": "#ffffff",
      "toolbar_field_text_focus": "#ffffff",
      "toolbar_field_focus": "#362b45",
      "toolbar_field_border": "#241834",
      "toolbar_field_border_focus": "#883938",
      "toolbar_field_highlight": "#185abc",
      "toolbar_field_highlight_text": "#ffffff",
      "toolbar_field_separator": "#b2b5b7",
      "toolbar_text": "#ffffff",
      "toolbar_top_separator": "#3d2841",
      "toolbar_bottom_separator": "#3d2841",
      "toolbar_vertical_separator": "#3d2841",
      "popup": "#2d213d",
      "popup_text": "#ffffff",
      "popup_border": "#282828",
      "popup_highlight": "#564d63",
      "popup_highlight_text": "#ffffff",
      "tab_loading": "#d75526",
      "tab_selected": "#3d2841",
      "sidebar": "#1b0e2c",
      "sidebar_highlight": "#4b4c4f",
      "sidebar_highlight_text": "#ffffff",
      "sidebar_text": "#ffffff",
      "sidebar_border": "#3c4043",
      "button_background_active": "#564359",
      "button_background_hover": "#4c384f",
      "icons": "#ededed",
      "icons_attention": "#ff5000",
      "ntp_background": "#180939",
      "ntp_link": "#ffffff",
      "ntp_text": "#ffffff"
    }
  }
}