doc/src/reference.css

/*============================================================================
    Copyright 2003-2004 Douglas Gregor
    Distributed under the Boost Software License, Version 1.0. (See accompany-
    ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
============================================================================*/

PRE.synopsis { 
  background-color: #e0ffff;
  border: thin solid blue;
  padding: 1em
}