Bleu Nuit Nuage 50 is Audemars Piguet's own name for the dial colour it revived from a 1970s Royal Oak archive reference, and it has become one of the most requested finishes in the collection. Against Rose Gold at 37mm the blue reads warm rather than cold, which is not how the same colour behaves in steel or white gold.

The Rose Gold case measures 37mm with the octagonal bezel and its eight hexagonal screws. The Bleu Nuit Nuage 50 dial carries the Grande Tapisserie pattern with Rose Gold applied hour-markers and Royal Oak hands. The integrated Rose Gold bracelet is fitted with an AP folding clasp and tapers into the case without lugs. The colour is applied over the tapisserie relief rather than under it, so the pattern reads through the finish and shifts between navy and near-black depending on the angle.

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