The Smurfs is the roundest, most cheerful flat-color comic world ever drawn — a mushroom village of three-apple-high blue creatures in crisp white Phrygian caps, inked in the soft Marcinelle line and filled with unmodulated poster color. Every shape is a rounded pebble: domed spotted-mushroom houses, bulbous noses, toadstool stools, tucked-in white trousers. It reads as a picture-book you could walk into. The palette is a paradox that works — cheerful sky-blue skin against forest greens and candy reds, all held by one clean, confident ink line with zero cross-hatching. Everything is a flat fill, no gradients: a whole gentle little world, drawn in circles and filled with flat happy color.