JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block">
    <div class="l"></div>
    <div class="c"></div> 
    <div class="r"></div> 
</div>

CSS

.block {
    position: relative;
}

.l {
    width: 100px;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    background: red;
}
.r {
    width: 100px;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    background: blue;
}
.c {
    height: 100px;
    margin: 0 100px;
    background: green;
}