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">
    <title>Document</title>
    <style>
        a {
            display: inline-block;
            padding: 2rem;
            margin: 1rem;
            background: royalblue;
            color: white;
            text-decoration: none;
            border-radius: 25px;

            transition: all 1s ease-in-out;
        }

        a:hover {
            background: red;
        }
    </style>
</head>
<body>
    <a href="#">Hey, Bang me so hard!</a>
</body>
</html>