body.greenTheme {
    background-image: url("images/bgGreen.png");
}
body.greenTheme div.interestBox {
    border-color: paleturquoise;
}
body.greenTheme #panel #sideMenu {
    background-color: mediumseagreen;
    border-color: green;
}
body.greenTheme section {
    border-color: paleturquoise;
}
body.greenTheme #changeColor:hover {
    background-color: blueviolet;
}