Codigo Css
hr {
display: block;
margin-top: 0.5em;
margin-bottom: 0.5em;
margin-left: auto;
margin-right: auto;
border-style: dotted;
border-width: 0.1em;
color:#F90;
}
linea en html
<hr align="center" color="#FF6600" width="100%" /hr>
