Feature Request : Metabox Titles Color

[X-Raym]

Hi !

I am a big fan of your plugin !

I was tweaking the admin CSS a bit and I found that to have a background color on metabox titles was absolutely gorgious !
It would be awesome if you could embed this feature into your plugin !

the CSS class are : .meta-box-sortables h3, .postbox h3, and it could be awesome if we could change both background and text color :)

Screenshot : http://cl.ly/image/0F29402g1635
Isn't that gorgious ? :)