My footer doesn't appear in another color than my body page

[Thibault1992]

Hi everybody,

I get this problem. I set my body's background color of my page in black. The header, the section and the article are in black which is exactly what I want. The problem is that I don't get changing the background color of the footer of this page which I wish putting in white. This footer contains a Newsletter form.

Firstly, I tried changing the color of the different sections of my page and I succeeded it. But when I tried just for the footer, it didn't work.

Do you have any ideas to solve this issue ? This is the HTML code I used.

</article>
</section>

<footer id="Newsletter">
<h1>Subscribe to the newsletter</h1>
<form method="post" action="traitement.php" />
<p><label for="Name">Name</label> : <input type="text" name="Name" id="Name" placeholder="My name" size="30"></p>
<p><label for="Name">Email adress</label> : <input type="email" name="Email" id="Email" placeholder="My email" size="40"></p>
</form>
</footer>

</body>
</html>

Thank you very much
Thibault