body {
    margin: 0;
    padding:0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18px;
    font-weight: bold;
}

header {
    background-color: #0c65a7;
}
nav {
    background-color: #124b78;
}
#infos {
    background-color: #bdddf7;
}
#navSecondaire {
    background-color: #ccccfc;
}
#main {
    background-color: #16a2c5;
}
aside {
    background-color: #5275ad;
}
footer {
    background-color: #7ccce3;
}
.content {
    text-align: center;
    padding: 10px;
}