JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row multi-columns-row kwayy-items-wrapper">
    <div class="kwayy-testimonial-box col-lg-4 col-sm-6 col-md-4 col-xs-12">
        <div class="kwayy-testimonial-data">
            <blockquote class="kwayy-testimonial-text">
                <div class="contarea">
                    <div class="kwayy-tst-contarea-text">
                         <h2 style="text-align: center;">one</h2>

                         <h4>first box</h4>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</div>
                </div>
                <footer> <span class="kwayy-testimonial-icon kwicon-fa-quote-left" style="font-style: italic"></span>  <cite class="kwayy-testimonial-title"></cite>

                </footer>
            </blockquote>
        </div>
    </div>
    <div class="kwayy-testimonial-box col-lg-4 col-sm-6 col-md-4 col-xs-12">
        <div class="kwayy-testimonial-data">
            <blockquote class="kwayy-testimonial-text">
                <div class="contarea">
                    <div class="kwayy-tst-contarea-text">
                         <h2 style="text-align: center;">two</h2>

                         <h4>second box</h4>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</div>
                </div>
                <footer> <span class="kwayy-testimonial-icon kwicon-fa-quote-left" style="font-style: italic"></span>  <cite class="kwayy-testimonial-title"></cite>

                </footer>
            </blockquote>
        </div>
    </div>
    <div class="kwayy-testimonial-box col-lg-4 col-sm-6 col-md-4 col-xs-12">
        <div class="kwayy-testimonial-data">
            <blockquote class="kwayy-testimonial-text">
                <div class="contarea">
                    <div class="kwayy-tst-contarea-text">
                         <h2 style="text-align: center;">three</h2>

                         <h4>third box</h4>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</div>
                </div>
                <footer> <span...

CSS

.kwayy-testimonial-box:nth-child(1) .contarea {
    background-color:#555;
}
.contarea {
    border:3px solid #333;
}