During the 1860s, Stevens became an immensely successful painter, known for his paintings of elegant modern women. His exhibits at the Salons in Paris and Brussels attracted favorable critical attention and buyers. An excellent example of his work during this time is "La Dame en Rose" or "Woman in Pink" (Royal Museums of Fine Arts of Belgium, Brussels), painted in 1866, which combines a view of a fashionably dressed woman in an interior with a detailed examination of Japanese objects, a fashionable taste called Japonisme of which Stevens was an early enthusiast. In 1863, he received the Legion of Honor (Chevalier) from the French government. In 1867, he won a first-class medal at the Universal Exposition in Paris, where he and Jan August Hendrik Leys were the stars of the Belgian section, and was promoted to Officer of the Legion of Honor. His friends included Édouard Manet, Edgar Degas, Charles Baudelaire, Berthe Morisot, James Abbott McNeill Whistler, Frédéric Bazille, and Puvis de Chavannes, and he was a regular in the group that gathered at the Café Guerbois in Paris.