<button class="custom-button">Submit</button>
.custom-button {
  padding: 8px 28px;
  background: #590CE5;
  border: 2px solid #400AA2;
  border-radius: 4px;
  color: #FFFFFF;
  font-family: Arial, sans-serif;
  font-size: 1.5rem;
}

External CSS

  1. https://codepen.io/eschafer/pen/bJbaLB

External JavaScript

This Pen doesn't use any external JavaScript resources.