Portrait of Louis Guillaume

Portrait of Louis Guillaume of 1882, now in the National Gallery of Art in Washington, depicts the son of a paint merchant in Aix-en-Provence who was acquainted with Cézanne. The boy — shown in dark clothes against a light background in a pose that combines formal sitting with a quality of natural stillness — became one of Cézanne's most important portrait subjects of the early 1880s. Child portraiture in this period typically emphasised sentimentality or social status; Cézanne's treatment is notably free of both, approaching the boy with the same empirical seriousness he brought to middle-aged sitters. The NGA holds this work as an example of Cézanne's middle-period portraiture, where his technique was consolidating from the earlier gestural works toward the systematic surface organisation of his mature style.

The layered application of modulated tones across the face and hands demonstrates Cézanne's developing method of building form through colour relationships rather than tonal value shifts. The dark clothing is handled in broad areas of blue-black with subtle modulation to describe the jacket's volume, and the light background is composed of multiple pale tones that vary across the surface.