JSFiddle - React, Tailwind, and code Playground

HTML

<form id="filterForm">
    <p class="filterOption filterSection">A</p>
    <p class="filterOption filterSection">B</p>
    <p class="filterOption filterSection">C</p>
    <p class="filterOption filterSection">D</p>
    <div class="blablabla"></div>
</form>

CSS

.filterOption:last-of-type {
    color:red
}