JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block">
    <div class="block2">
        <img src="img.jpg" />
        <a class="test" href="#"><h3>Заголовок</h3></a>
    </div>
</div>
<div class="block">
    <div class="block2">
        <img src="img.jpg" />
        <a class="test" href="#"><h3>Заголовок</h3></a>
    </div>
</div><div class="block">
    <div class="block2">
        <img src="img.jpg" />
        <a class="test" href="#"><h3>Заголовок</h3></a>
    </div>
</div>

CSS

a {
    color:#000;
}
.block2:hover a {
    color:#f00;
}