div.messageBox.info a:link { color: black !important }
div.messageBox.info a:hover { color: red !important }
div.messageBox.info a:active { color: blue !important }
div.messageBox.info a:visited { color: yellow !important }
If you use the Internet Explorer, Chrome or Safari browsers you can use their built-in developer tools to point at and “inspect” elements on a web page to find out what styles they use. You can even tweak the styles live to experiment with any changes you might fancy. If you use Firefox then there is an add-on named Firebug you can install which gives that browser the same functionality as the developer tools built into the other browsers.
References:
http://www.w3schools.com/css/css_pseudo_classes.asp
