JSFiddle - React, Tailwind, and code Playground

HTML

<div class="arrow-up"></div>
<div class="arrow-down"></div>
<div class="arrow-left"></div>
<div class="arrow-right"></div>

CSS

.arrow-up {
        width: 0;
        height: 0;
        border-left: 25px solid transparent;
        border-right: 25px solid transparent;

        border-bottom: 25px solid black;
}

.arrow-down {
        width: 0;
        height: 0;
        border-left: 20px solid transparent;
        border-right: 20px solid transparent;

        border-top: 20px solid #f00;
}

.arrow-right {
        width: 0;
        height: 0;
        border-top: 60px solid transparent;
        border-bottom: 60px solid transparent;

        border-left: 60px solid green;
}

.arrow-left {
        width: 0;
        height: 0;
        border-top: 10px solid transparent;
        border-bottom: 10px solid transparent; 

        border-right:10px solid blue;
}