Headphones

I solved it on July 6, 2022. You can try to beat my record on CSSBattle!

337 chars

<body bgcolor=293D7E><p a><div><p b><p b><style>body{padding:37 107}p{display:inline-block; margin:0}p[a]{padding: 75 65;border: 20px solid #6E91CA;border-bottom:0;border-radius: 50% 50% 0 0}div{display:flex;justify-content: space-between}p[b]{position:relative;top:-50;background:#6E91CA;padding:40 30;border-radius:26px 26px 40px 40px}