-webkit-filter: grayscale(1);
-moz-filter: grayscale(1);
-o-filter: grayscale(1);
-ms-filter: grayscale(1);
filter: grayscale(1);
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: gray;
-webkit-filter: grayscale(0);
-moz-filter: grayscale(0);
-o-filter: grayscale(0);
-ms-filter: grayscale(0);
filter: grayscale(0);
filter: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><filter id='grayscale'><feColorMatrix type='matrix' values='1 0 0 0 0, 0 1 0 0 0, 0 0 1 0 0, 0 0 0 1 0'/></filter></svg>#grayscale");