here is my css, background color is not change correct color, how to change bg color pls help me 
.v-menubar-submenu {
background: transparent;
}
.v-menubar {
background: blue;
color:red;
font-size:16px;
color:#1d9dff;
font-weight:normal;
border:activeborder;
background-color: #d4e7f3;
}
.gwt-MenuItem {
background: black;
color:red;
font-family: Geneva,Arial,Helvetica,sans-serif;
font-size:12px;
}
.gwt-MenuItem-selected {
font-family: Geneva,Arial,Helvetica,sans-serif;
font-size:12px;
color: lime;
}
.menuitem {
font-size:12px;
color:green;
font-weight: bold;
border:activeborder
}
.main-body {
background:black;
}