JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>hello</td>
        <td>world</td>
    </tr>
    <tr class="alpha">
        <td>dere</td>
        <td>oida</td>
    </tr>
</table>

CSS

tr.alpha {
    background-color:#00BFFF;
    
}