London, Dec. 28 (PTI): Mumbai-born sculptor Anish Kapoor has triggered a row with the creator of the world's "pinkest pink" by acquiring the colour illegally.

The 61-year-old London-based artist had hit the headlines earlier this year after he had acquired the exclusive right to use the world's "blackest black".

Artist Stuart Semple retaliated by banning him from purchasing or using the "PINK" created by him.

Buyers of the paint were asked to sign a legal declaration at checkout to ensure that Kapoor or his associates would not be able to get their hands on it, according to The Independent.

But last week Kapoor posted a picture of his middle finger dipped in PINK on social media with the caption "Up yours". "It's obviously very disappointing that Anish has illegally got his hands on the world's Pinkest paint," Semple told The Creators Project.

"If anyone knows who is behind sharing it with him it would be good if they could come forward.

"Anish is still very much at large, not just with the blackest black but now the stolen pinkest pink. Luckily he's failed to get his hands on the world's glitteriest glitter so we would urge purchasers to refrain from sharing any with him or his associates," he added.