css text에 반씩 색넣기

body {
  height: 100vh;
  margin: 0;
  background: linear-gradient(90deg, #3498db 50%, #ffffff 50%);
}

p {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  color: #3498db;
  font-size: 7vw;
  font-family: 'Open Sans', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  white-space: nowrap;
}

p::before {
  position: absolute;
  top: 0;
  left: 0;
  content: attr(data-split);
  width: 50%;
  color: #fff;
  overflow: hidden;
}