#principal{
    position:relative;
    width:950px;

}

#html{

    padding-top:30px;
    padding-bottom:100px;
	background-repeat: repeat-x;
    /*height:200px;*/
    /*background-color: #fff;*/
}

/*dentro de principal*/
#col1{
    height:200px;
    background: url('../images/muestra-fondo.gif');
    color:#fff;
    margin-bottom:40px;
    margin-top:20px;
}

h1{
  color:#fff;

}