The Canadians have had colorful currency for a long time, but now that whimsy is also part of the new Passport design, including UV-reactive images that can only be seen under a blacklight. Via FeelDesain:
The UV images are completely normal looking under everyday light. But when you put a blacklight on them, the pages come alive with wildly bright and standout hues. Along with a biometric chip, this passport is going to be extremely hard to falsify. Party on!