JSFiddle - React, Tailwind, and code Playground

HTML

<div id="grad1">
  
</div>

CSS

body {
  background-color:red;
}
#grad1 {
  
        height: 200px;
    background: -webkit-linear-gradient(341deg, #8a8a8a  0%, #8a8a8a  31.9%, #000 32.1%, #000 100%); /* For Safari 5.1 to 6.0 */
background:linear-gradient(341deg, rgba(138,138,138,0)  0%, rgba(138,138,138,0)  31.9%, #000 32.1%, #000 100%);
}