In Portrait de Claude Renoir, fils de Pierre Renoir, we see a young boy, Claude, portrayed with a gentle expression. The colors are soft and warm, featuring shades of blue, pink, and cream. Claude is dressed in a light-colored outfit, which contrasts with the darker background.

The brushwork is loose, typical of Impressionism, giving the painting a lively feel. The painting is executed in oil on canvas, a common medium for Renoir. The dimensions are approximately 65 x 81 cm, making it a medium-sized portrait. The loose brush strokes and vibrant colors are characteristic of Renoir's style, emphasizing light and movement.

The focus on the subject's expression captures a moment of innocence. Pierre-Auguste Renoir was a leading figure in the Impressionism movement, known for his ability to capture light and color. This portrait of his son, Claude, reflects his deep affection for his family. Interestingly, Claude would later become an artist himself, continuing the family legacy.

This work exemplifies Renoir's transition towards more intimate and personal subjects in his later career.