Blockquoting with class

No, don’t touch that code! You’ll break everything!

I really love the way this forum at www.remarpro.com presents block quotes for user comments. I’m assuming this is a result of using TinyMCE functionality, or something similar? I have “blockquote” added in my comments tool bar on my own blog using TinyMCE, but I’d like to implement something similar to the look and feel of this forum’s blockquote styling. How can this be done? In this forum, for instance, is this accomplished with CSS styling and a particular plugin? Any helpful information would be much appreciated.