JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block">
  <h2 class="title">Какой-то заголовок</h2>
</div>

CSS

.block {
  width: 300px;
  height: 200px;
  margin: 30px;
  border: 1px solid grey;
}

.title {
  width: 250px;
  margin: 0 auto;
  margin-top: -15px;
  background-color: #f3f5f6;
  text-align: center;
}