JSFiddle - React, Tailwind, and code Playground

HTML

<table class='myTable' border='1'>
<tr>
  <td rowspan='3'>HEADER</td>
</tr>
<tr>
  <td>something</td>
</tr>
<tr>
  <td>something</td>
</tr>
<tr>
  <td rowspan='3'>HEADER2</td>
</tr>
<tr>
  <td>something2</td>
</tr>
<tr>
  <td>something2</td>
</tr>
</table>

CSS

.myTable [rowspan]:last-of-type {
  color: red;
}