Hue Sort Test

An adaptation of the Farnsworth-Munsell 100 Hue Test, a standard measure of colour discrimination. Each tray shows a row of coloured caps with the two ends fixed. Drag the caps, or tap one and then another to swap them, so the colours form a smooth gradient from the left end to the right end.

Your Total Error Score counts how far each cap sits from where it belongs, so a perfect arrangement scores 0. Take your time and work in even, indirect light — screen brightness, colour profile and viewing angle all affect the result, so this is an indication rather than a clinical assessment.