To change the font color of a text, use the fontcolor() method. This method causes a string to be displayed in the specified color as if it were in a <font color="color"> tag.
Example
You can try to run the following code to change the font color of a text using JavaScript −
<html>
<head>
<title>JavaScript String fontcolor() Method</title>
</head>
<body>
<script>
var str = new String("Demo Text");
document.write(str.fontcolor( "blue" ));
alert(str.fontcolor( "blue" ));
</script>
</body>
</html>