Tailwind CSS class .col-end-auto

    <div class="grid grid-cols-6 gap-4 h-30">
        <div class="p-4 col-end-auto bg-teal-400">1</div>
        <div class="p-4 bg-gray-400">2</div>
        <div class="p-4 bg-gray-400">3</div>
    </div>