:muted
Targets media elements (like <video> or <audio>) when they are currently muted.
Quick example
video:muted {
/* Visual indicator that the video is currently silent */
opacity: 0.8;
border: 2px solid #ef4444;
}:muted Browser Support
Limited availability 13% global usage
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Not ready for production without a fallback.
15.4+