JSFiddle - React, Tailwind, and code Playground

HTML

<div id="div-one">
    <div class="div-two">some </div>
    <div class="div-two">some </div>
    <div class="div-two">some </div>
</div>

CSS

.div-two { border-top:1px solid; background:red }
#div-one .div-two:last-child { border-bottom:1px solid; background:yellow; }