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About this page & FAQ

About PlayMemorize Nuance

Nuance is a low-contrast colour perception streak game. Each round shows a flat-colour canvas; somewhere on it, a single digit or letter slowly fades into view in a sibling shade of the same hue. Tap the glyph the moment you can see it. Tap the wrong spot · or wait too long · and the round ends.

How it works. The background is generated from a random hue, saturation, and lightness. The hidden glyph starts at the exact same colour and ramps up to a peak lightness gap over a few seconds. The peak gap is the "nuance ceiling" · easy difficulty caps it at about 32%, hard caps it near 4%. Lower ceiling = subtler glyph = harder. The fade-in time also grows with difficulty, so harder rounds give you a longer ramp to spot the glyph before the round times out.

Three glyph pools. Numbers (0-9), letters (a curated Latin subset that skips ambiguous shapes like I/O/Q), or both. The mode is fixed per round so you don't have to spend mental cycles figuring out whether a faint shape is a 0 or an O.

Deterministic seeds. Like every PlayMemorize game, Nuance is fully reproducible from a small per-round seed. That means the labyrinth and the standalone page render identical rounds when you replay them, and a "share this round" link always shows the same hidden glyph at the same spot in the same colour. No pixel data ships with the repo · the canvas is rendered live from a handful of numbers.

What it trains. Low-contrast chromatic sensitivity · the same skill that Ishihara colour-blindness plates probe, and the skill behind reading dim screens, foggy displays, or anything washed out. Nuance gamifies it: every correct round bumps the streak, every miss resets it, and the high streak is stored locally so you can chase your own best.

Part of the PlayMemorize family of free brain-training games. Runs entirely in your browser, works offline as a Progressive Web App.

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Q: What is Nuance?

A low-contrast perception streak game. The screen shows a single flat colour; a digit or letter slowly emerges in a sibling shade of the same hue and you have to tap it the moment you see it. Like a moving Ishihara plate · the longer you wait, the more obvious the glyph gets, but a wrong tap (or a timeout) ends the streak.

Q: How is the difficulty defined?

Difficulty controls the peak lightness gap between the glyph and the background at the end of the fade-in ramp. Easy ends at about 32% lightness difference (clearly visible by the last second), medium at 16%, hard at around 4% (almost invisible even at peak). Harder difficulties also use a longer ramp · so you have more time to spot a subtler signal.

Q: Where does the glyph appear?

A random spot in the canvas, kept at least one glyph-radius away from every edge so the hitbox is never clipped. Position is part of the seeded data, so the same round seed always lands the glyph in the same place.

Q: How do I tap it?

Tap or click anywhere on the canvas. If your tap is within the glyph hit radius (a touch larger than the glyph itself), the round wins · the verdict shows how fast you spotted it. If you tap the wrong spot, the round ends and a marker shows where the glyph actually was.

Q: What happens when the round times out?

A timeout counts as a fail · the glyph snaps to full contrast, a marker shows where it was, and the streak ends. The timeout is the fade-in length plus a short thinking buffer, so even on hard difficulty you get a few seconds at peak contrast before the round closes.

Q: Is the canvas the same for everyone?

Yes. Nuance is fully deterministic from the seed · the labyrinth, the standalone page, and a shared deep-link all render the same round when handed the same seed. No images ship with the game; the canvas is generated live from a handful of HSL numbers.

Q: Is colour vision required?

No · the only cue is lightness, not hue. Players with red-green or blue-yellow colour-vision differences can play without disadvantage. The game is intentionally a pure-luminance test (the same channel Ishihara plates use), so the answer never depends on telling two hues apart.

Q: Can I play offline?

Yes. PlayMemorize is a Progressive Web App and Nuance is part of the offline pre-cache. Once loaded, every round generates locally · no network needed.