JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tr>
  <td>#0068b3</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>
<tr>
  <td>#aebde1</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>
<tr>
  <td>#0068b3</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>
<tr>
  <td>#aebde1</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>
</table>

CSS

table tr:nth-child(even) td:first-child {
    background:#0068b3
}
table tr:nth-child(odd) td:first-child {
    background:#aebde1
}