Gzhel is the Russian folk craft of cobalt-blue hand-painting on white-glazed porcelain, codified in the 19th century in the villages near Moscow. Its signature is the single-stroke "brush-shadow" gradient: one loaded stroke fades from saturated cobalt to pale sky, so each petal, leaf and bird carries its own light. This design system treats the cool fired-glaze white as breathing space — never crowded — and lets organic botanicals bloom in a strictly cobalt-on-white palette.