[Joey][1] has [this trick][2] of embedding the Windows logo image within the kbd tags. So 

    <kbd>![][winlogo]</kbd> 

Looks like


<kbd>![][winlogo]</kbd> 


  [winlogo]: https://i.sstatic.net/Rfuw7.png


  [1]: http://superuser.com/users/2054/joey
  [2]: http://superuser.com/questions/501239/how-to-open-explorer-with-mouse-only/501248#comment599076_501248