Hue Hunt

A short calibration learns which colour axis your eye reads best, then the run begins. Each round shows a grid of nearly identical tiles with one shade off, tap it before the timer drains.

• Tap the odd tile fast; correct picks shrink the colour difference for the next round (harder), misses grow it.
• Each round is on a 6-second clock; running out counts as a miss.
• Finish the fixed set of rounds; faster, finer catches score more.
• Your finest caught shade (in delta-E) is reported at the end.

• Desktop: click the off-colour tile; click Daily or Practice and New run.
• Phone & tablet: tap the tile, built for touch.

• Scan for the tile your eye keeps drifting back to rather than checking each one in turn.
• Trust the calibration, the game biases toward the axis you read best, so commit quickly.

Hue Hunt measures and trains your sensitivity to subtle colour differences.

• Skills: colour perception, visual discrimination, hue sensitivity
• Best for: all ages
• For parents & teachers: sharpens sensitivity to subtle colour.

Calibrating which colour axis your eye reads best, then finding the one tile that is slightly off, is measuring a just-noticeable difference.

Calibrating per player is the original refinement.

Sensitivity genuinely differs by axis and by person. Human colour vision resolves some hue ranges far more finely than others — we discriminate greens better than blues — so a fixed difficulty would be measuring the axis rather than the player.

Hue Hunt is a perception game that measures and trains your sensitivity to subtle colour differences. It is an original, free browser game built in-house.

A free, original browser game on PlayPendium. No download, no install.