JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="left"></div>
    <div class="central"></div>
    <div class="right"></div>
</div>

CSS

.wrapper {
    width:100%;
    height:50px;
    display: table;
}
.central {
    width:360px;
    height:50px;
    background-color:#CCCCCC;
    display: table-cell;
}
.left, .right {
    height:50px;        
    display: table-cell;
    background-color:#ABC123;
}
.right {
    background-color:#123456;
}