| <head> |
| <style> |
| .box { |
| width: 200px; |
| height: 200px; |
| background-color: silver; |
| filter: url(#filter); |
| } |
| |
| svg { |
| display: none; |
| } |
| </style> |
| </head> |
| <body> |
| <svg xmlns="http://www.w3.org/2000/svg" width="0" height="0" version="1.1"> |
| <defs> |
| <filter id="filter"> |
| <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="1" seed="5" stitchTiles="stitch"/> |
| <feColorMatrix type="saturate" values="0"/> |
| <feComponentTransfer> |
| <feFuncR type="linear" slope="0" intercept="0"/> |
| <feFuncG type="linear" slope="0" intercept="0.5"/> |
| <feFuncB type="linear" slope="0" intercept="0"/> |
| <feFuncA type="linear" slope="0" intercept="1"/> |
| </feComponentTransfer> |
| </filter> |
| </defs> |
| </svg> |
| <div class="box"></div> |
| </body> |
