JSFiddle - React, Tailwind, and code Playground

HTML

<div class="el">
  <div class="el_header">
    Hello
  </div>
  <div class="el_header">
    Hello
  </div>
  <div class="el_header">
    Hello
  </div>
  <div class="el_header">
    Hello
  </div>
  <div class="el_header">
    Hello
  </div>
</div>

SCSS

.el {
  height: 500px;
  width: 500px;
  
  &_header {
    height: 100%;
    width: 10%;
    background: #555;
    display: inline-block;
    line-height: 500px;
    text-align: center;
    
    &nth-of-type(odd) {
      color: black;
    }
    &nth-of-type(even) {
      color: white;
    }

  }
}