In Captain Charles Stewart, Thomas Sully presents a detailed portrait of the naval officer. The painting features rich colors, predominantly deep blues and warm browns, which create a sense of depth and character. Captain Stewart is depicted in his naval uniform, exuding confidence and authority.

The background is subtly painted, allowing the figure to stand out prominently. The painting is executed in oil on canvas, a common medium for portraits during the Romantic period. Sully's technique showcases fine brushwork and attention to detail, particularly in the rendering of the captain's facial features and uniform. The dimensions of the artwork are approximately 76 x 61 cm, making it a sizable portrait that draws the viewer's attention.

The use of light and shadow enhances the three-dimensional quality of the figure. Thomas Sully was a prominent American portrait painter known for his romantic style and ability to capture the likeness of his subjects. This portrait of Captain Charles Stewart, painted in the 1840s, reflects the growing interest in naval heroes during this period. An interesting fact about this work is that Captain Stewart was a notable figure in the War of 1812, which adds historical significance to the portrait.

Sully's ability to convey character through expression and posture is evident in this piece.