body {
    background-color: #535759;
}
#canvases canvas {
    margin: 20px auto;
    display: block;
}
/* width */
::-webkit-scrollbar {
    width: 5px;
}

/* Track */
::-webkit-scrollbar-track {
    background: #f1f1f1;
}

/* Handle */
::-webkit-scrollbar-thumb {
    background: #888;
}

/* Handle on hover */
::-webkit-scrollbar-thumb:hover {
    background: #555;
}