In Au Brusc, Armand Guillaumin captures a vibrant landscape filled with rich greens and blues. The painting features a serene water scene, likely depicting a coastal area. The sky is painted with soft, warm hues, suggesting a late afternoon or early evening setting.

This use of color creates a lively atmosphere, inviting the viewer into the scene. The painting is executed in oil on canvas, a common medium for Impressionist artists. Guillaumin's brushwork is loose and expressive, allowing the colors to blend seamlessly. The dimensions of the artwork are approximately 73 x 92 cm, making it a substantial piece that commands attention.

The composition draws the eye toward the horizon, enhancing the sense of depth. Armand Guillaumin was a key figure in the Impressionist movement, known for his bold use of color and light. Au Brusc is particularly interesting as it reflects his love for the natural world and his ability to convey emotion through landscape. Guillaumin was also a close friend of Vincent van Gogh, and their influences can be seen in each other's works.

This painting exemplifies the transition from traditional landscape painting to the more modern, expressive style of Impressionism.