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How did Georges Seurat create colour effects through pointillism?

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van de Velde, Adriaen: River Landscape in the Late Afternoon — Landscape painting *River Landscape in the Late Afternoon*, oil on canvas by Adriaen van de Velde, 1663; in a private collection.

Georges Seurat, the founder of Neo-Impressionism, developed pointillism by applying scientific optical principles to painting. Rather than mixing pigments on a palette, he systematically applied small, uniform dots of pure, contrasting color directly onto the canvas.12

This technique relies on the viewer's eye to perform an optical mixture, where the retina perceives the calculated arrangement of dots as a single, cohesive hue from a distance. By covering the entire surface with these dots, Seurat was able to define forms without relying on traditional lines, bathing his subjects in an intense, vibrating light. This method allowed him to move away from the spontaneous, hazy effects of Impressionism toward a more formal, calculated, and monumental style. His approach, also known as divisionism, treated color and form as subjects for scientific study, resulting in works that appear both clear and harmoniously structured.2