【WordPress】hrタグのカスタマイズ

当該テーマのスタイルシート (style.css) に追加

hr {
  line-height: 1em;
  position: relative;
  outline: none;
  border: none;
  color: black;
  text-align: center;
  height: 1.5em;
  opacity: .5;
  margin: 1.8em 1.0em 0em 0.5em;
}
hr:before {
  content: '';
  background: -webkit-linear-gradient(left, transparent, #818078, transparent);
  background: linear-gradient(to right, transparent, #818078, transparent);
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
}
hr:after {
  content: '';
  position: relative; top:-4px; 
  display: inline-block;
  color: black;
  padding: 0 .5em;
  line-height: 1.5em;
  color: #818078;
  background-color: #ffffff;
}

☟☟☟こんな感じ☟☟☟