Hi,
You should be able to do this in the stylesheet file for your theme.
From the backend, go to Appearance > Editor
The stylesheet edit page should be the first page you land on, if not select it (from the list on the right, stylesheet.css).
if you don't know how to edit CSS, here is a good place to get some basic know-how: http://www.w3schools.com/cssref/pr_background-color.asp
Most footers will be something like:
#footer{
background-color: #add_color_code_here;
}
yours looks more like this:
footer .col-sm-6 {
background: #707070; /*That is the color code in your social icons*/
color:#FFF; /*This may make the font color white*/
}
Of course there may be a few more classes you need to change in order to change the color on a specific element. (If it's not something you can control in your theme options in the first place).
Have fun.
If it's all too overwhelming, feel free to contact a developer like me.