【見出し】ブックマーク風

<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>h2{
  width: 300px;
  height: 50px;
  line-height: 50px;
  padding: 0.5em;
  margin: 10px;
  color: #494949;
}

.midashi {
  background: #142c5b;
  vertical-align: middle;
  border-radius: 25px 0px 0px 25px;
  color: #FFF;
}

.midashi:before {
  content: '●';
  color: #FFF;
  margin-right: 8px;
}</style>
</head>
<body>
<h2 class="midashi">ブックマーク風の見出し</h2>
<script>
</script>
</body>
</html>

h2{
  width: 300px;
  height: 50px;
  line-height: 50px;
  padding: 0.5em;
  margin: 10px;
  color: #494949;
}

.midashi {
  background: #142c5b;
  vertical-align: middle;
  border-radius: 25px 0px 0px 25px;
  color: #FFF;
}

.midashi:before {
  content: '●';
  color: #FFF;
  margin-right: 8px;
}