JSFiddle - React, Tailwind, and code Playground

HTML

<script>
  window.onload = function(){
    var color = "red",
    		setcolorLink = document.getElementById("setcolor");
        
    setcolorLink.setAttribute("data-value", color);
    setcolorLink.click();
  }
</script>

<a id="setcolor" class="colors" href="javascript:void(0)" role="button" data-value="mycolor">Choose color</a>