JSFiddle - React, Tailwind, and code Playground
HTML
<div>
</div><div>
</div><div>
</div><div>
</div><div>
</div><div>
</div><div>
</div><div>
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</div><div>
</div>CSS
div {background: #000; width: 50px; height: 50px; float: left; margin-right:10px; margin-bottom: 10px; }
div:nth-last-child(-n+6) { background: #ff0000; }