JSFiddle - React, Tailwind, and code Playground

HTML

<div>
        <img src="https://image.flaticon.com/icons/png/128/346/346167.png" />
    </div>
    <div>
        <img class="c1" src="https://image.flaticon.com/icons/png/128/346/346167.png" />
    </div>
    <div class="c1">
        <img src="https://image.flaticon.com/icons/png/128/346/346167.png" />
    </div>

CSS

div {
            width:300px;
            background-color: lightblue;
            margin:1em;            
        }

        .c1 {
            filter: grayscale(100%);
        }