changing border color for widget recent forum posts

[bongwater]

How do we change the border color for the widget "recent forum posts" ? We looked at every stylevar and made changes, but the border for the Recent Forum Posts still remains visible. We would like to either remove the light colored border entirely, or change it to #22222 color.

http://img694.imageshack.us/img694/3913/arrowb.jpg

thanks