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HTML
<head>
</head>
<body>
<h1>Title</h1>
<p>Some paragraph text.</p>
</body>
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HTML
<head>
<style>
h1 { color: #FF0000; }
</style>
</head>
<body>
<h1>Title</h1>
<p>Some paragraph text.</p>
</body>
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HTML
<head>
<style>
#heading { color: #FF0000; }
</style>
</head>
<body>
<h1 id="heading">Title</h1>
<p>Some paragraph text.</p>
</body>