SO fiddle
Test Fiddle mainly for SO Questions
by Nick Craver
HTML
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<span>C:\ My Name</span>
JavaScript
$('span:contains("C:\\ My Name")').css('color', 'red');