JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<thead>
<tr><th>1</th><th>2</th><th>3</th></tr>
</thead>
<tbody>
<tr>
<td align="left">RS-232</td>
<td align="left">8</td>
</tr>
</tbody>
</table>

CSS

table tr td {
    color: grey;
}
table tr:hover td {
    color: red;
}