JSFiddle - React, Tailwind, and code Playground

HTML

<div class="rec">
  
</div>

CSS

.rec {
   margin: 10px; 
   float: left;
   height: 500px;
   width: 500px;
   background: linear-gradient(135deg, rgb(134, 108, 83) 0%, rgb(134, 108, 83) 12.5%, rgb(127, 107, 86) 12.5%, rgb(127, 107, 86) 12.6%, rgba(228, 175, 104, 0) 12.6%, rgba(228, 175, 104, 0) 100%);
}