.centerimage {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 40%;
    max-width: 640px;
}

.center {
    text-align: center;
}

body {
    background: blue; /* darkgreen darkblue */
    color: white;
}

A.a2white:link {color: white;}
A.a2white:visited {color: white;}
A.a2white:active {color: white;}
A.a2white:hover {color: white; }