To change color in JavaScript, do this:
element.style.color = 'red'.For example, if this is your element with some text in it:
<span id="my-text">Hello World!</span>
Then you can change the color of Hello World! to, say, red with this JavaScript:
document.getElementById('my-text').style.color = 'red';
Background Color
Or you can change the background color of Hello World! to, say, yellow with this JavaScript:
document.getElementById('my-text').style.backgroundColor = 'yellow';