<!DOCTYPE html>
<html>
<head>
<title>Der Titel des Dokuments</title>
<style>
::placeholder {
color: #1c87c9;
opacity: 1; /* Firefox */
}
:-webkit-input-placeholder { /* Chrome, Safari, Opera */
color: #1c87c9;
}
::-ms-input-placeholder { /* Microsoft Edge */
color: #1c87c9;
}
</style>
</head>
<body>
<form action="/action_page.php">
Vorname: <input type="text" name="firstname" placeholder="John"><br><br>
Nachname: <input type="text" name="lastname" placeholder="Lennon"><br><br>
E-Mail-Adresse: <input type="email" name="email" placeholder="YourEmail@gmail.com">
</form>
</body>
</html>