Forgive this second post - it seems I need a whole new post to put my updated lighthouse card onto the CAS(E) this Sketch! page.
For me the blue completely changes the look of the card - lifts it somehow.
(Later - hence the edit - I have discovered that it IS possible to delete an inlinkz post - you just have to know where to look, and to have cookies enabled. I live and learn!)
The older post below tells how to recreate this card.