how to refer to id in css code example

Example 1: css id

<style>
	#your_id{
		color: blue;
		font-size: 24px;
	}
</style>
<h1 id="your_id">Example text</h1>

Example 2: how to call an id in css

<style>
  #selector {
  color: red;
}
/* # is id selector */
</style>


<div id="selector">
<p>This is an id</p>
</div>