In Nu allongé sur un sofa, Henri Matisse presents a reclining nude figure draped across a sofa. The colors are vibrant, with bold reds, blues, and yellows dominating the composition. The figure's form is simplified and stylized, emphasizing curves and contours.

The setting is intimate, suggesting a personal space filled with warmth and comfort. The painting is executed in oil on canvas, showcasing Matisse's characteristic use of color and form. The brushwork is fluid, creating a sense of movement and softness around the figure. The background is less detailed, allowing the viewer's focus to remain on the figure itself.

The dimensions are approximately 100 x 150 cm, making it a substantial work that commands attention. Henri Matisse was a leading figure in the Fauvism movement, known for his bold use of color. Nu allongé sur un sofa reflects his exploration of the human form and the emotional power of color. Interestingly, this work was created during a period when Matisse was experimenting with new techniques and styles.

It exemplifies his shift towards a more modern approach to figurative painting.