Little Laura on "Why won't my background color change?"

Website: Creaturecomfortsofbalto.com

New at this; can't figure out what I'm doing wrong. I have a lot of changes to make, and the very first one isn't working! Here's what I've tried:

/*
 Theme Name:     Twenty Twelve Child
 Theme URI:      http://example.com/twenty-thirteen-child/
 Description:    Twenty Thirteen Child Theme
 Author:         John Doe
 Author URI:     http://example.com
 Template:       twentytwelve
 Version:        1.0.0
*/
@import url('../twentytwelve/style.css');
body {
    background-color: #F9F9F0;
}