How do I change my background color I'm using vshare 2.7

Please help how do I change background color to Black i'm using vshare 2.7

Edit style.css and findout following

HTML Code:

---

body {
    background-attachment: fixed;
    background-image: url("../images/main_bg.jpg");
    background-position: center top;
    font-size: 12px;
    margin: 0;
    padding: 0;
}

---

Replace with

HTML Code:

---

body {
    background-color: #000000;
    font-size: 12px;
    margin: 0;
    padding: 0;
}

---