The palette
Water is a single band here, crossing the lower third of the sheet: give it a clear, deep ink and it carries the whole composition, with the far bank as a second, quieter grid below it. The oval and the half-circle take the same green as the many small patches scattered across the sheet, so they read by their shape; a quiet green keeps the patches from competing with them. The avenues need no colour of their own: their length and their angle set them apart.