JSFiddle - React, Tailwind, and code Playground

HTML

<table class="mytable">
    <tr>
        <td>Content</td>
        <td>Content</td>
        <td>Content</td>
    </tr>
     <tr>
        <td>Content</td>
        <td>Content</td>
        <td>Content</td>
    </tr>
     <tr>
        <td>Content</td>
        <td>Content</td>
        <td>Content</td>
    </tr>
</table>

CSS

.mytable
{
border-collapse:collapse;
border-color:#000000; 
border-style:solid; 
border-width:2px;
}

.mytable td
{
border-color:#cccccc; /*grey*/
border-style:solid; 
border-width:1px;
}