I am trying to change the background of my pages and posts in Twenty Eleven theme to solid black. Right now it is off-black. I have images on my site that are solid black and you can see them against the off-black, which I don't want. My website is http://www.popalchemy.com and here's a link to an image of it with notes showing what I want changed: http://www.popalchemy.com/wp-content/uploads/2013/08/bgproblem.jpg
Can you help? Thanks!