Navigation Bar with Dropdown, remove hover button background

[rooky06]

Hello

I would like to know how to remove the button backgound hover color when the mouse is in the w3-dropdown-content.

<div class="w3-bar w3-light-grey">
  <a href="#" class="w3-bar-item w3-button">Home</a>
  <a href="#" class="w3-bar-item w3-button">Link 1</a>
  <div class="w3-dropdown-hover">
    <button class="w3-button">Dropdown</button>
    <div class="w3-dropdown-content w3-bar-block w3-card-4">
      <a href="#" class="w3-bar-item w3-button">Link 1</a>
      <a href="#" class="w3-bar-item w3-button">Link 2</a>
      <a href="#" class="w3-bar-item w3-button">Link 3</a>
    </div>
  </div>
</div>

Thank you.