JSFiddle - React, Tailwind, and code Playground

HTML

<div id='uno'>
    <div id='dos'>&nbps;</div>
    <div id='tres'>&nbsp;</div>
</div>

CSS

*{
        margin:0px;
        padding:0px;
    }
#uno {
    width:100%;
    height:200px;
    background-color:silver;
    display:table;
    padding:10px 0;
}
#dos {
    display:table-cell;
    width:50px;
    height:180px;
    background-color:black;
}
#tres {
    display:table-cell;
    height:180px;
    background-color:white;
}