title: How to create a transparent Apple Touch icon for Safari bookmarks?
body: <p>When browsing through my Safari bookmarks on an iPad, it seems that some of the bookmarks, e.g., the one for Stack Overflow are transparent: there are no visible borders and the background color of the icon is exactly the same as that of the background outside the icon.</p>
  
  <p>See the picture below.</p>
  
  <p>To me it seems that the icon is not just using the same background color, but it is 'transparent'. If you look at the picture, the Stack Overflow has the shadowing effect, but the other icons do not (or am I just imagining?).</p>
  
  <p>What is the trick here? How to make the icon look transparent? Will the transparency turn the background into black - as one could expect based on numerous postings on using transparency for Apple icons?</p>
  
  <p>If this is just a question of using the same color code with the rest of the background, then what color code should I use?</p>
  
  <p><img src="https://i.stack.imgur.com/Jfgsm.png" alt="enter image description here"></p>