<div class="text">文字</div>
.text {
  font-size: 6rem;
  color: #fff;
  text-shadow: 1px 1px 0 #000,
               -1px 1px 0 #000,
               1px -1px 0 #000,
               -1px -1px 0 #000;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.