JSFiddle - React, Tailwind, and code Playground

HTML

<div class="text">
  <h1>Простой градиентный текст</h1>
</div>

CSS

.text {
  background: linear-gradient(5deg, rgba(73, 221, 216, 1) 0%, #3369e7 100%);
  background-size: cover;
  text-align: center;
  font-size: 10vw;
  color: #fff;
}

h1 {
  color: #000;
  background: #fff;
  mix-blend-mode: lighten;
  font-size: 10vw;
}