JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
    <div class="col"></div>
</div>

CSS

html,
body{
    height: 100%;
}
div{
    height: 100%;
}
body{
    margin: 0;
}
.wrap{
    width: 50%;
    background-color: #79CFF0;
}
.col{
    width: 100vw;
    background-color: rgba(26,69,152,.5);
    height: 50%;
}