<div class="vmin">75 VMIN</div>
<div class="vmax">75 VMAX</div>

div {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
  margin-bottom: 30px;
  color: #fff;
}

.vmin {
  width: 75vmin;
  background: rebeccapurple;
}

.vmax {
  width: 75vmax;
  background: hotpink;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100dvh;
  margin: 0;
}