Untitled

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <script>
        document.addEventListener("DOMContentLoaded", () => {
            const buttons = document.querySelectorAll("button");
            for (const button of buttons) {
                button.addEventListener("click", () => {
                    document.querySelector("h1").style = `color: ${button.innerText.toLowerCase()}`;
                })
            }
        });
    </script>
    <title>Colors</title>
</head>

<body>
    <h1>Change Me!</h1>
    <button>Red</button>
    <button>Blue</button>
    <button>Green</button>
</body>

</html>