JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="bwp-rc-ulist">

<li class="recent-comment">Item 1</li>
<li class="recent-comment">Item 2</li>
<li class="recent-comment">Item 3</li>
<li class="recent-comment">Item 4</li>
<li class="recent-comment">Item 5</li>
<li class="recent-comment">Item 6</li>
<li class="recent-comment">Item 7</li>
<li class="recent-comment">Item 8</li>
<li class="recent-comment">Item 9</li>
<li class="recent-comment">Item 10</li>

</ul>

CSS

li:nth-child(6n+1) {  
  color: red; 
}

li:nth-child(6n+2) {  
  color: blue;
}