Black

A giraffe's tongue reaches 45–53 cm with a tip colored deep blue, black, or purple. The dark hue comes from melanin, and the leading explanation is ultraviolet protection: giraffes spend 16–20 hours browsing with the tongue out, so its most exposed part needs sunscreen.

When sculptor Anish Kapoor bought exclusive artistic rights to Vantablack—the world's blackest material absorbing 99.965% of light—artist Stuart Semple sold his pigments to everyone except Kapoor. His site's cookie button reads 'I am not Anish Kapoor.'