HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>contextmenu toggle</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    #block {
      background: blue;
      color: white;
      height: 100px;
      width: 200px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      cursor: context-menu;
      user-select: none;
    }
    #block.contextmenu {
      background: yellow;
      color: black;
    }
    #hint { margin-top: 12px; color: #475569; }
  </style>
</head>
<body>
  <div id="block">Right click the block</div>
  <p id="hint">Each right-click toggles between blue and yellow.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var div = $("#block");
    div.on("contextmenu", function() {
      div.toggleClass("contextmenu");
    });
  </script>
</body>
</html>

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jQuery contextmenu event — toggle background color (Try It)