The color property specifies the color of the text of an element and can be expressed as a hexadecimal value, RGB, HSL, or as an HTML color keyword.

div {
    color: red;
}

These are the allowed values.

The HTML element can also be styled using JavaScript and the element’s id.

document.getElementById('my_div').style.color = 'red';

<button onclick='my_function()'>Click Here</button>

<script>
function my_function() {
    document.getElementById('my_div').style.color = 'red';
}
</script>