Arguably the best known dial color found on Royal Oak timepieces, the present watch features a "sapphire blue" dial according to the official Audemars Piguet nomenclature. However, even the greenest watch enthusiast is aware of the fact that the community knows it by a different, very appropriate nickname: the "Yves Klein".

Active during the mid-twentieth century, Yves Klein was a member of the Nouveau-Réalisme movement. He is best known for his bright blue monochrome paintings and sculptures. Amusingly, at his first public exhibition he featured canvases of different colors (orange, red, yellow, pink and blue) but the reaction of the public - who insisted on finding an unexisting connection between the works - prompted him from then on to radicalize his work even more and focus on just one color: the now famous Yves Klein blue, of which this dial color is -serendipitously - a near-perfect replica.