The Port at Sunset

A sailing boat glides into harbor with the light behind it, its lateen sails catching the last of the sun. Paul Signac painted this at Saint-Tropez, a small fishing village he reached by boat in 1892 and returned to for decades afterward. He was a passionate sailor who owned something like thirty boats over his lifetime, so the rigging here is not decorative guesswork. The vessel is a tartane, the workhorse of the Mediterranean coast, and Signac knew exactly how its sails would hang in a light evening breeze.

The whole surface is built from separate dots and dashes of unmixed color, a technique called Pointillism or, as Signac preferred, Divisionism. He and Georges Seurat worked it out from color theory: place orange next to blue, let the viewer's eye do the blending, and the result should glow more than mixed paint ever could. Whether it fully works is up to you, but the water is worth studying, where orange reflections sit right beside violet ones without either dulling the other. Signac also gave his paintings opus numbers like musical compositions, a hint at how he thought about arranging color: less like copying a scene, more like tuning a chord.