Granting that the OP quested after the box in [robjohn's post](http://meta.math.stackexchange.com/questions/10210/how-to-include-my-codes-in-a-blue-box#comment37612_10211), with many thanks to robjohn, I promulgate it explicitly:

`\bbox[5px,border:2px solid #0000FF]{\text{ STUFF HERE }}`