JSFiddle - React, Tailwind, and code Playground

HTML

<table style='table-layout:fixed;width:100%' border='1'>
    <tr>
        <th style='width: 20%;'>Column1</th>
        <th style='width: 100px;'>Column2</th>
        <th >Column3</th>
        <th style='width: 200px;'>Column4</th>
        <th >Column5</th>
    </tr>
</table>

CSS

th:nth-child(even) {
    background:repeating-linear-gradient(to left, yellow 0, yellow 50px, gray 50px , gray 100px);
}