Arrange the shuffled chips into a smooth colour gradient.
Ready when you are
Hue Sort is a colour-arrangement game inspired by the Farnsworth-Munsell hue test. Each round gives you a row of colour chips that should form a smooth gradient from one end tile to the other. The two end tiles are locked in place; the chips in between arrive shuffled, and your job is to put them back in order.
You arrange the chips by tapping two of them to swap their places. Keep swapping until the whole row transitions smoothly from the left end cap to the right one, with no chip jumping out of sequence.
Early rounds use just a few chips with big steps between them, so ordering is easy. Later rounds add more chips, which means smaller steps and much subtler differences between neighbours. Telling whether two adjacent teals are in the right order is exactly the kind of fine discrimination the Farnsworth-Munsell test was built to measure.
Each position is scored on how close the colour you placed there is to the colour that actually belongs there, using the CIEDE2000 perceptual metric. That means a chip one slot out of place barely costs you, while a chip on the wrong side of the row costs a lot. A perfectly sorted row is 10 points; five rounds give a 50-point ceiling.
