JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" class="red" value="click" />
<input type="button" class="green" value="click" />
<div type="button">Some text here</div>

CSS

[type="button"]
{
    background-color: #0000FF;
}
.red
{
    background-color: #FF0000;
}

.green
{
    background-color: #00FF00;    
}