Forum:How do I get these boxes on my wiki?

I am looking to get these special accent boxes on my wiki, I have tried to examine the code but cannot figure it out. Maybe somebody with a little more mediawiki coding experience can lend a hand. I am not looking for the content itself, just the knowledge on how to create these boxes. The screen shot if from Software Wiki. My Wiki, thx WifiShadow 22:22, August 11, 2010 (UTC)