css:htmlGrey

common.css

html {
	filter         : grayscale(100%);
	-webkit-filter : grayscale(100%);
	-moz-filter    : grayscale(100%);
	-ms-filter     : grayscale(100%);
	-o-filter      : grayscale(100%);
	filter         : url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale");
	filter         : progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
	-webkit-filter : grayscale(1);
}