In Oceano Nox, the viewer is greeted by deep blues and blacks that dominate the canvas, evoking the vastness of the ocean at night. The waves are depicted with dynamic brushstrokes, creating a sense of movement and energy. A faint light glimmers on the water's surface, hinting at a distant moon or star.

The overall atmosphere is both tranquil and mysterious, inviting contemplation of the sea's depths. The painting is characterized by its bold use of color and expressive brushwork, typical of Henri de Toulouse-Lautrec's style. The composition focuses on the interplay of light and shadow, enhancing the dramatic effect of the night scene. The dimensions are approximately 80 x 60 cm, making it a medium-sized work that draws the viewer in.

The oil on canvas medium allows for rich textures and depth in the colors. Henri de Toulouse-Lautrec was known for his depictions of Parisian nightlife, yet Oceano Nox showcases his versatility as an artist. This work reflects his fascination with the natural world, particularly the sea, which he often explored in his travels. An interesting fact about this painting is that it captures a moment of solitude, contrasting with his more vibrant depictions of social scenes.

The piece is housed in the Musee d'Orsay, where it continues to intrigue visitors.