Now look chaps. My RIB is Cyan or Prussian blue right.
It's just that the tube fabric guys have got it all wrong and Ibiza Blue is some funny name dreamed up by people who have probably been taking something they shouldn't have last time they had a Med. holiday.
My wife says the correct technical name is Cyan and if you want to argue with HER then the best of luck to you. I don't-but then I am chicken (or smart whichever way you want to look at it). You could try looking up Cyan in the dictionary. That's what I did (when she wasn't looking, of course!)