Template:Box

Usage:

{{Box
 |border_color=#ddd
 |background_color=#f6f6f6
 |content=Hello this is a box
}}

with sub content:

{{Box
 |border_color=#ddd
 |background_color=#f6f6f6
 |secondary_background_color=#efefef
 |content=Hello this is a box
 |subcontent=I'm secondary content
}}