In Portrait of Whistler, the artist Henri Fantin-Latour presents a striking image of the renowned painter James Whistler. The painting features a somber color palette dominated by deep browns and blacks, which adds to the serious expression on Whistler's face. Whistler is depicted in a three-quarter pose, dressed in dark clothing, with his gaze directed slightly off to the side.

The background is muted, allowing the viewer to focus on the figure and his contemplative demeanor. The painting is executed in oil on canvas, showcasing Fantin-Latour's skill in capturing texture and detail. The brushwork is precise, particularly in the rendering of Whistler's facial features and clothing. The use of light and shadow adds depth to the composition, enhancing the three-dimensionality of the figure.

This work exemplifies the Realism style, emphasizing a truthful representation of the subject. Henri Fantin-Latour was a contemporary of James Whistler and often painted portraits of his fellow artists. This particular work reflects the strong friendship and mutual respect between the two artists. Interestingly, Fantin-Latour was known for his still lifes and flower paintings, making this portrait a notable departure from his usual subjects.

The painting not only captures Whistler's likeness but also hints at the artistic dialogue between them during the late 19th century.