JSFiddle - React, Tailwind, and code Playground

HTML

<a class="new" onclick="alert('Click !');">Retour</a>

CSS

a.new {
  color: white;
  background-color: #371951;
  padding: 5px 10px;
  border-radius: 0;
  border: 0;
  font-size: 14px;
  transition: all 0.2s  linear;
}
a.new:hover,
a.new:focus {
  color: #9770b9;
}
a.new:active{
  background-color: white;
  color: #371951;
  outline: 1px solid #371951;
  transition: 0.2s all linear;
}