JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content"> 
    <span class="overlay">X</span>
    X
</div>

<div class="content"> 
    <span class="overlay">Y</span>
    Y
</div>


<div class="content"> 
    <span class="overlay">Z</span>
    Z
</div>

CSS

body {
    background: #000;
}

.content {
    display: inline-block;
    position: relative;
    font-size: 50px;
    color: grey;
    text-shadow: yellow 2px 2px;
}

.overlay {
    width: 70%;
    height: 70%;
    position: absolute;
    color: red;
    overflow: hidden;
    text-shadow: white 2px 2px;
}