Paul Signac (1863–1935) was a French Neo-Impressionist painter and one of the key figures in the development of Pointillism, a technique in which small, distinct dots of color are applied to create a larger image. Signac, along with Georges Seurat, played a crucial role in defining and popularizing this method.

Signac's work is characterized by vibrant colors, meticulous organization of dots, and a scientific approach to color theory. His notable paintings include "The Port of Saint-Tropez" and "The Pine Tree at Saint Tropez." Signac was deeply influenced by the ideas of divisionism and color theory, and he believed that the juxtaposition of pure colors could create a more intense and harmonious visual experience.

In addition to his artistic contributions, Signac was an influential art theorist and a passionate advocate for modern art. He co-authored the influential book "From Eugène Delacroix to Neo-Impressionism," where he outlined the principles of Neo-Impressionism. Signac's dedication to these ideas helped establish Pointillism as a significant movement in the late 19th and early 20th centuries, influencing subsequent generations of artists.