From Wikimedia.
Countess Olga wears a deep blue dress with strongly contrasting white virago sleeves accented with sapphire and gold jewelry.
Keywords: 1824, Riesener, Olga Naryshkina, Olga Potokich Naryszkin, Olga Potocka, Potoka family, Naryszkin family, Countess, Russian, curly coiffure, jeweled feathered hat, bateau neckline, modesty piece, virago sleeves, girdle, vee waistline, necklace, earrings, clasps, jeweled arm bands