<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
h1{
text-decoration: underline;
text-decoration-color: red;
animation: myAnimation 5s infinite;
-webkit-animation: myAnimation 5s infinite; /* Safari 4.0 - 8.0 */
}
@keyframes myAnimation {
50% {text-decoration-color: green;}
}
/* Safari 4.0 - 8.0 */
@-webkit-keyframes myAnimation {
50% {text-decoration-color: green;}
}
</style>
</head>
<body>
<h1>CSS Animatable text-decoration-color</h1> </body>
</html>