JavaScript - Change the Button Color

In this tutorial, we are going to learn about how to change the color of a button using JavaScript.

Consider, that we have the following button element in our HTML:

<button id="btn">Login</button>

Now, we want to change the above button background color using JavaScript.

Changing the button color

To change the button color, first we need to access the button element object inside the JavaScript using the document.getElementById() method.

const btn = document.getElementById("btn");

Now, set its style.backgroundColor property to your desired color (eg: blue , red, etc).

btn.style.backgroundColor = "blue";

We can also change its font color using the style.color property.

btn.style.color = "white";

Full example:

<button id="btn">Login</button>

JavaScript:

const btn = document.getElementById("btn");

btn.style.backgroundColor = "blue"; // changes button bg color
btn.style.color = "white"; // changes button font color