From Statens Museum for Kunst, Copenhagen:
The subject of Zulma is a nude in an interior; a recurring feature in countless of Matisse’s earlier paintings and sculptures.
Here, however, she has been reduced to simply being a sign for woman, a coloured silhouette. The same is true of the space around the figure and the effect of light and shadow.
Each element has been transformed to planes of colour interacting in accordance with the same principles used in Portrait of Madame Matisse, painted 45 years before.