.colored p{
   color: red;
}
article > .colored{
   color:powderblue;
}
.blue{
   color: white;
}
  <!DOCTYPE html>
<html lang="ko">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
    <div class="colored">
      <p>hello</p>
      <p class="blue">hello</p>
      <div>
        <p>hello</p>
      </div>
    </div>
    <p>hello</p>
    <article>
      <div class="colored">hello</div>
    </article>
</body>
</html>Why isn't the blue selector applied??? It's applied when I changed it(p.blue). I don`t know the difference between first case and second case ..
 
    