JSFiddle - React, Tailwind, and code Playground

by Tobias Beuving

HTML

<div id="box">

</div>

CSS

#box {
  width: 100px;
  height: 100px;
  border: 1px solid black;
}

JavaScript

var r = 255;
var g = 0;
var b = 0;
var a = 50;

var newColour = "rbga(" + r + "," + g + "," + b + "," + a + ")";
//alert('newColour');
box.style.backgroundColor = newColour;