JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="inner" style="background-color: white;"></div>
  <div class="inner" style="background-color: red;"></div>
  <div class="inner" style="background-color: green;"></div>
  <div class="inner" style="background-color: blue;"></div>
  <div class="inner" style="background-color: purple;"></div>
</div>

CSS

.container {
  width: 300px;
  height: 300px;
  margin: 0 auto;
  background-color: yellow;
  /* important part */
  display: grid;
  place-items: center;
  grid-template-areas:
                  "inner-div";
}

.inner {
  height: 100px;
  width: 100px;
  /* important part */
  grid-area: inner-div;
}