Change background on Studio Theme using child.css

I am using the Studio Parent/Child 1.2.9.2 and am having trouble the changing the #ececec background color to something I specified. I even tried to use a image and had the same effect. No matter what I do, the #ececec color found in theme-options.php seems to override?

How do I fix this but make sure I don't "break" the theme from future updates?

Child.css:

body {
background: #eae0d6;
/*background-image:url(/wp-content/themes/studio-theme-1.2.9.2/studio/_inc/images/eae0d6.png);
background-repeat:repeat;*/
}