<label for="firstName">First Name:</label>
<input name="firstName" type="text" value="Adam">

<label for="age">Age:</label>
<input name="age" type="number" value="42" readonly>

<label for="hobbies">Hobbies:</label>
<textarea name="hobbies" readonly>Baseball</textarea>

label {
    display: block;
    margin-top: 1em;
}

input:read-only,
textarea:read-only {
    background-color: silver;
}