JSFiddle - React, Tailwind, and code Playground

HTML

<button class="btn">Button
</button>

CSS

.btn {
  width: 250px;
  height: 60px;
  margin: 25px;
  border-radius:4px;
  background: linear-gradient(to bottom right, rgba(228,245,252,1) 0%,rgba(191,232,249,1) 50%,rgba(159,216,239,1) 51%,rgba(42,176,237,1) 100%); /* W3C */
}