body, p, ol, ul, td {
  font-family: verdana, arial, helvetica, sans-serif;
  font-size:   14px;
  line-height: 18px;
}

#notice{
  color: green
  font-size: 14pt;
  font-weight: bold;
}
#error_notice{
 color: red
font-size: 14pt;
font-weight: bold;
}

<div id="notice"><p>stuff</p></div>
<div id="error_notice"><p>blah</p></div>