index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Color Flipper</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="container">
      <div class="main-content">
        <div id="button-section">
          <button id="fav-btn">Add to Favorites</button>
          <div id="liste">
            <span href="#" id="instant-color">#000000</span>
          </div>
          <button id="change-btn">Change Background</button>
        </div>
        <div id="fav-section">
          <h2>Favorite Colors List</h2>
          <ul id="fav-list"></ul>
        </div>
      </div>
    </div>
    <script src="./main.js"></script>
  </body>
</html>