JSFiddle - React, Tailwind, and code Playground

HTML

<div class="div">dsdas</div>
<div class="div">123</div>
<div class="div">73</div>
<div class="div">63</div>
<div class="div">53</div>
<div class="div">45</div>

CSS

.div:nth-of-type(1) {
    background-color: red;
}