1.gradient-text {
2  font-size: 48px;
3  background: linear-gradient(to right, #ff0000, #00ff00, #0000ff);
4  -webkit-background-clip: text;
5   -webkit-text-fill-color: transparent;
6    background-clip: text;
7    color: transparent;
8}

1<div class="gradient-text">Gradient Text</div>