JSFiddle - React, Tailwind, and code Playground

HTML

<div class="list">
    <div class="item">
        <span class="fill">&nbsp;</span>
    </div>
    <div class="item">
        <span class="fill">&nbsp;</span>
    </div>
    <div class="item">
        <span class="fill">&nbsp;</span>
    </div>
</div>

CSS

.item {
    display: block;
    width: 150px;
    margin-top: 10px;
    margin-bottom: 10px;
    padding-bottom: 10px;
    padding-top: 10px;
    border-bottom: 1px solid red;
}

.fill {
     background-color: #aaa; 
     display: block;
     height: 150px;
}

.bg {
    background-color: #ccc;
}