JSFiddle - React, Tailwind, and code Playground

HTML

<div class="a b c">
    
</div>

<div class="a b">
    
</div>

CSS

.a {
    height:50px;
    width:50px;
}

.a, .c {
    background-color: yellow;    
}

.b {
    background-color: red;
}