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HTML

<div class="border">Hi I have two border colors<br />I am also Fluid</div>

CSS

div.border{border:1px solid #000; position:relative;padding: 20px;}
div.border:before{position:absolute; display:block; content:''; border:1px solid red; height:100%; width:100%; box-sizing: border-box; -moz-box-sizing: border-box; -webkit-box-sizing: border-box;margin:-20px;}

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JSFiddle - React, Tailwind, and code Playground

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