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.container {
  display: table;
  background: #7396a1;
  height: 100px;
  color: #fff;
  margin-left: auto;
  margin-right: auto;
}

.content {
  display: table-cell;
  vertical-align: middle;
  padding: 0 30px;
}

<div class="container">
  <div class="content">I'm aligned vertically!</div>
</div>