JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>1</td>
        <td>2</td>
        <td>4</td>
        <td>4</td>
    </tr>    <tr>
        <td>1</td>
        <td>2</td>
        <td>4</td>
        <td>4</td>
    </tr>    <tr>
        <td>1</td>
        <td>2</td>
        <td>4</td>
        <td>4</td>
    </tr>    <tr>
        <td>1</td>
        <td>2</td>
        <td>4</td>
        <td>4</td>
    </tr>    <tr>
        <td>1</td>
        <td>2</td>
        <td>4</td>
        <td>4</td>
    </tr>
</table>

CSS

tr:nth-of-type(1), tr:nth-of-type(2) {background-color:red;}
tr:nth-of-type(3), tr:nth-of-type(4) {background-color:green;}