This comment has been removed by the author.
To tide her over until this color comes to fruition, I recommend p2 Gigantic (from Germany). It is the most vibrant cobalt blue jelly-creme that seems to have a smidge of indigo, and it's the closest I've seen to IKB. It's stunning. :)
Or Orly Royal Navy, China Glaze Frostbite, Revlon Royal... ?