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<html><head><style> #myDIV { width: 300px; height: 200px; outline: 15px solid red; animation: mymove 5s infinite;}@keyframes mymove { 50% {outline-color: blue;}}</style></head><body><h1>Animation of outline-color</h1><p>Gradually change the outline-color property from red to blue then back to red:<p><div id="myDIV"></div></body><!-- Mirrored from www.w3schools.com/cssref/tryit.php?filename=trycss_anim_outline-color by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 16:50:31 GMT --></html>