you can use id to get the element you want to style.
<!DOCTYPE html>
<html>
<body>
<p id="myp">Click the button to change the style of the p element.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var color1 = Math.floor((Math.random() * 255) + 1);
var color2 = Math.floor((Math.random() * 255) + 1);
var color3 = Math.floor((Math.random() * 255) + 1);
document.getElementById("myp").style.color = "rgb("+color1+","+color2+","+color3+")";
}
</script>
</body>
</html>
solved How to read
with JavaScript [closed]