3-2 css/style.css

body {
    background: #F5F4E9;
}

#nav {
    background: #A5BB8F;
}

aside {
    background: #DADEC5;
    min-height: 450px !important;
}

article {
    min-height: 450px !important;
}

#footer {
    background: #A5BB8F;
    min-height: 150px;
}