main {
  margin: 400px auto;
}

div {  
  text-align: center;
  font-style: italic;
  font-weight: 800;
  text-transform: uppercase;
  font-size: 5rem;
  line-height: 5rem;
}

.top-color {
  color: red;
}

.middle-color {
  color: #FFBF00;
}

.top-color,
.middle-color {
  font-size: 9rem;
  line-height: 8rem;
} 

.bottom-color {
  position: relative;
  width: max-content;
  margin: 0 auto;
  color: green;
}

.bottom-color::after {
  content: "";
  height: 0.5rem;
  background-image: linear-gradient(to right, blue, red);
  width: 100%;
  position: absolute;
  bottom: -0.5rem;
  left: 0;
}