JSFiddle - React, Tailwind, and code Playground

HTML

<div>
   <span>Меня надо выровнять</span>
</div>

CSS

div {
  height: 200px;
  background: #FAF375;
  text-align: center;
}
div:before{
  content: '';
  display: inline-block;
  vertical-align: middle;
  height:100%;
}

span {
  font-size: 2em;
  display: inline-block;
  background: green; 
  width: 60%;
  vertical-align: middle;
}