Footer widgets bagground colors and adjust to middle

Hello I like to change the color widgets box background in the footer area, it is now white I like it to have now color, so think I need to be transparent. I can find where I can change it so I need some help with it. And I don´t now if it is possible to adjust it so that it is the middle of the footer area instead of to the left. My page is: http://garnmasken.dk Hope you can help me Best regards Anne-Pia Hansen