Want to Change Main Background Color to Black

Site link?

https://www.quinncouture.com and the part Im refering to is the middle section where my post are. The outsite background with the picture, Im fine with

If you change middle background from white to black then you will need change the font color as well

#mainwrapper {
background: none repeat scroll 0 0 #FFFFFF;
border-bottom: 2px solid #CCCCCC;
border-top: 2px solid #CCCCCC;
float: left;
margin: 0;
padding: 15px 10px;
}

Change #FFFFFF to #000000

When you said Change #FFFFFF to #000000 is that for the font?

never mind, I figured it out thanks so much ??