Color Hue Test
Tap the tile with the different shade. Right answers grow the grid and shrink the difference; wrong taps cost 2 seconds. You have 60 seconds.
About color discrimination
Your eyes tell colors apart by comparing signals from three cone types, and small hue differences get harder to see as saturation and context change. This game starts with an obvious difference on a 2×2 grid and quietly tightens the gap while the grid grows toward 8×8 — by the end you're separating shades only a few percent apart. Tips: don't stare at one tile (peripheral vision compares better), and blink to reset when everything starts looking identical. Note this is a casual game, not a medical color-vision test.
Frequently asked questions
Is this a color blindness test?
No — it's a casual game about fine shade discrimination, not a medical test. Color-vision deficiencies involve specific hue confusions (like red-green) and are diagnosed with clinical plates. If you suspect one, see an eye specialist.
Why do all the tiles suddenly look the same?
Staring at one color for seconds fatigues the cones tuned to it, flattening the differences — an effect called chromatic adaptation. Blink, glance away for a moment, or scan with your peripheral vision instead of fixating.
Does screen quality affect my score?
Somewhat. Brightness, night-mode filters and cheap panels compress shade differences. For your best score, turn off blue-light filters, raise brightness, and play on a decent display — then compare records on the same device.