how to change calender widget text color?

Hi, using suffusion 4.0.1, site url is http://www.instituteofchairmans.com/

In my right hand sidebar there is a calender widget, currently white text on a white background, I was hoping to change either the text color to black, or the background color to #75062d.

I can’t find a way to do this only to the calender widget. Been using firebug to show me what’s going on, but this one still eludes me.

I like the white text colour everywhere else, just not for this particular widget!