JSFiddle - React, Tailwind, and code Playground
by Liu David
HTML
<div class="gradient">
</div>
CSS
div{
width:160px;
height:160px;
border:solid 1px blue;
}
.gradient{
background-image: radial-gradient(circle at 50% 0%, #f00 44.7%, transparent 44.7%);//5**0.5/5
}