Write in the CSS file

  code is as follows:  


01. HTML {filter: grayscale (100%); Webkit - filter: grayscale (100%); Moz - filter: grayscale (100%); - ms - filter: grayscale (100%); The -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 0 0 0.3333 0.3333 0.3333 0.3333 0.3333 0.3333 0.3333 0.3333 0.3333 0 0 0 0 0 0 0 1 \'/></filter> </svg> # grayscale "); Filter: progid: DXImageTransform. Microsoft. BasicImage (grayscale=1); Webkit - filter: grayscale (1); }

actually is also add a grey filter


This concludes the body part