White roses in a vase

White Roses in a Vase from 1903, now in the National Museum in Warsaw, belongs to a tradition of Post-Aven still-life painting in which domestic objects — flowers, fruit, ceramics — were treated with the same Synthétist approach applied to landscape and figure subjects. White flowers presented a particular chromatic challenge — their apparent absence of colour made them ideal subjects for exploring how colour perception works under different lighting conditions. Ślewiński had maintained an interest in still-life subjects alongside his figure and landscape work throughout his Brittany period, and the white rose offered a quiet, formally concentrated subject suited to close contemplative attention.

White roses require nuanced handling of tonal and temperature variation within an apparently colourless subject — the cool shadows, warm reflected lights, and subtle local colour of white petals under natural light creating a surprisingly complex chromatic range. Ślewiński's Synthétist approach simplifies these variations into a more organised, harmonious system of colour relationships.