JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td class="smp1" rowspan="3" > 1</td> 
        <td class="sm2"></td>
    </tr>
</table>

CSS

.sm2 {      
        width: 300px; 
        background-color : #FF0000; 
        font-family: Helvetica, Arial, sans-serif; 
        color:#FFFFFF; 
        font-size:15px; 
        text-align:center; 
        vertical-align: middle; 
        line-height:25px; 
    }