JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" class="white-out">
    <img src="http://placehold.it/300x200" />
</a>

CSS

body {
    background: whiteSmoke;
}

a.white-out {
    display: inline-block;
    background: #fff;
}
    a.white-out img {
        opacity: 0.2;
    }