JSFiddle - React, Tailwind, and code Playground

HTML

<div class="example1">
    I am a solid color
</div>
<br />
<div class="example2">
    I am a transperant color
</div>

CSS

.example1{
    background-color:#75845c;
    color: #e1e818;
}

.example2{
    background-color:#75845c;
    color: rgba(255, 255, 0, 0.6);
}