The blackcurrant was a small, round edible berry produced by the shrub Ribes nigrum. Although the skin of this berry was black, its juice was a deep purple, and thus most references to "blackcurrant" as a colour meant the latter.
In 1994, Vernon Dursley became terrified when Harry Potter mentioned that he was writing to his godfather Sirius Black (who was widely believed to be an escaped mass murderer, though he was in fact innocent), which caused the colour to drain from his anger-flushed face, making it look like "badly mixed blackcurrant ice-cream."
- Harry Potter and the Goblet of Fire (Mentioned only)
- Harry Potter and the Half-Blood Prince (Mentioned only)