<svg xmlns="http://www.w3.org/2000/svg" style="width: 100px; height: 100px;">
<defs>
<filter id="simpler">
<feFlood flood-color="green"/>
</filter>
</defs>
<rect style="fill: red" width="4167" height="100">
</rect>
<rect style="fill: #000099; filter:url(#simpler);" width="100" height="4167">
</rect>
</svg>