You could wear blue-colored contacts, or — if you happen to be a character in "Dune," the movies based on Frank Herbert's sci-fi books — you could ingest some spice. They'd have the same effect.

In its gas form, it is said to be an orange-ish color, however when it appears in bins in God Emperor of Dune it is said to glow a “radiant blue.” If there’s one real-world spice most ...