Help needed in WordPress Theme

Hi! I need help to change the background colour of one of the widget.

Please have a look on this site www.internet-marketing-series.com/blog

And my question is... how to change the background colour of "Recent Posts" widget same as the background colour of "Categories".

Your help is much appreciated.

 

Backgrounds seem to match.

 

try to edit style.css in theme editor section.

 

Edit Style.css and stylesheet and if you need help with it,then i cn do it for you for a little charge..

 

Thanks everybody it fixed.