header, footer, .adsbygoogle { display: none; }
img.white {
    background-color: black;
}
img.black {
    background-color: white;
}
img.lightgray {
    background-color: darkgray;
}
img.lightgreen {
    background-color: #414a39;
}
img.gray {
    background-color: gray;
}
img.darkgray {
    background-color: lightgray;
}