Codes to remove colored box in my drop down menu items - Hover option preferred

Hi there!
If anyone could help me find the code that removes the white box that is around my drop down menu items that would be awesome! Id prefer to just have no box with color and just have the text with the hovering option only. 
Thank you so much!!

Try this Custom CSS:

.header-nav-folder-content {
  background-color:none;
}
.header-nav-wrapper .header-nav-item a {
  color:#fff;
}

Hope it helps