/* html {
  filter: grayscale(100%);

    -webkit-filter: grayscale(100%);

    -moz-filter: grayscale(100%);

    -ms-filter: grayscale(100%);

    -o-filter: grayscale(100%);

    filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);

    -webkit-filter: grayscale(1);
} */