SVG - patrickcole/learning GitHub Wiki
background: url('data:image/svg+xml,\
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">\
<text y="1em" style="font-size: 90px">a</text>\
</svg>');
background-size: 100px 100px;
list-style-image: url('data:image/svg+xml,\
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">\
<text y="1em" font-size="90">😀</text>\
</svg>');