<!-- If you want to change te color of an svg element with CSS, the best way
to do it is by targeting the individual elements used inside the svg. See
example below: -->
<!DOCTYPE html>
<html>
<head>
<style>
circle {
stroke: yellow;
fill: red;
}
line {
stroke: blue;
}
</style>
<body>
<svg>
<g>
<line x1="18" y1="6" x2="6" y2="18"/>
<circle cx="50" cy="50" r="40"/>
</body>
</html>