Let the color war begin: In reaction to Anish Kapoor's (@dirty_corner) monopoly on #vantablack—the blackest black—artist Stuart Semple (@stuartsemple) created the pinkest pink, and banned Kapoor from buying it. Buyers, in fact, must guarantee that they are not Anish Kapoor and have no intention to give him the pigment. But today it seems someone broke that rule. "Up yours," Kapoor wrote, giving the pinkest bird. #sharetheblack? #sharethepink? #sharetherainbow? Which side are you on?