Change the font colour of a widget

Hello I have been trying to change the font colour of my 'about' widget at the bottom of each page of my site. It is currently grey and I would like to make it black. I have tried adding to my css style sheet: .with-line-above p { color: black !important; } However it remains grey, I wonder if there is something overriding that I need to change first? my site is www.thebrinkonline.org Thankyou for your help!