Add base16-qutebrowser

doc/help/configuring.asciidoc

@@ -390,6 +390,11 @@ xresources = read_xresources('*')
 c.colors.statusbar.normal.bg = xresources['*.background']
 ----
 
+Using color from base16
+^^^^^^^^^^^^^^^^^^^^^^^
+
+A collection of https://github.com/chriskempson/base16[base16]-color-schemes can be found in https://github.com/theova/base16-qutebrowser[base16-qutebrowser] and used with https://github.com/AuditeMarlow/base16-manager[base16]-manager.
+
 Avoiding flake8 errors
 ^^^^^^^^^^^^^^^^^^^^^^