JSFiddle - React, Tailwind, and code Playground

HTML

<label for="itemImageId" style="color: gray" id="labelForImageUploadID">Item image</label>
<input type="button" onclick="document.getElementById('labelForImageUploadID').style.color='blue'" value="Click Me to Change Color" />

JavaScript

document.getElementById("labelForImageUploadID").style.color = "red";