Memory Stack

Rebuild a hidden row of colors in the same order.

Memorize the row, left to right.

How this game actually plays

What you are looking for

Memory Stack shows an ordered row of colors, then hides it. Rebuild the row from left to right by tapping from a pool that includes the targets and similar distractors. The row submits when it is full. Early rows have two colors, then three, four, then five. After you reach five, new rounds stay at five instead of ending the game. Play again returns you to two.

How the difficulty moves

Length is the difficulty. Distractors stay in the same neighborhood as the targets, so a longer row is not just more taps; it is more order to hold. Once the row is five, the game keeps dealing five-color rows so you can see whether you hold a full line or only a short one. There is no timer.

What a score is

The score is how many rows you rebuilt correctly, including the continuing fives. It is a count of ordered recalls on this screen, not a working-memory clinical score. A drop after the row grows usually means order failed, not that a single color was unknown.

Common mistakes

Tapping the right colors in the wrong seats is still a miss. The row cares about sequence. Another miss is treating the five-color stage as a finale and stopping; Next round will deal another five. If the pool looks identical, slow down and lock the first two colors before touching the rest. Build left to right even when a later color feels more obvious. When the row sticks at five, you are no longer unlocking a new length — you are repeating a full line. That is the point. A clean two-color row and a collapsed five-color row together say more than a single lucky five.

On this sitting

A correct set of colors in the wrong seats is still a miss. That is the whole difference between this row and Color Memory's six-choice pick. Hold the sequence as a small rhythm: first, second, rest. When the row stays at five, you are practicing the full rhythm, not unlocking a sixth secret length. If a five collapses, drop back with Play again and build the rhythm from two.

Keeping the sitting honest

Stay on this page until the round is finished rather than bouncing to another game mid-score. The controls you just used are the whole rule set; nothing is hiding in a settings panel. If a result surprises you, replay once on the same screen before you change rooms or devices. That second sitting is the only comparison this site can honestly support. Everything else — other phones, other people, other times of day — is a different experiment. Use Play again or Next round from the same seat. The copy on this page describes this game only; it is not a template with the title swapped.

What changes as you play?

Hidethen rebuild the row
Growsfrom two colors to five
Staysat five and keeps going

The sample row is gone while you rebuild it.

After five colors, new rounds keep the same length instead of ending.

Make a small color journey.

These three routes are only suggested sequences. You can open any of the sixteen games on its own, leave a route halfway, or skip the pairing entirely. Each game keeps its own score on this screen and this sitting. Nothing here adds those scores into a combined rank, a skill grade, or a color-vision result. Play the first game to notice one kind of judgment, then the second to see how that judgment changes when the task is slightly different.

notice

Notice more.

Start at a color-name boundary, then hunt for a single off tile.

Blue or Green? asks you to name a turquoise as one familiar word or the other. Spot the Different then asks you to find a single off tile among many similar ones. Start with the naming game so you feel how a hue can sit on a boundary; then hunt for a tile that is only a little off. The first game is about the word you choose. The second is about a visual difference with no name attached.

hold

Hold the shade.

Remember one color, then rebuild another with the previews hidden.

Color Memory shows a target, hides it, then offers six close options. Blind Sliders hides the mix as well, so you rebuild from hue, saturation and lightness numbers only. Do memory first: you still see the choices. Then try blind mixing, where even your own swatch is gone until you reveal it. One task is recognition among near-misses. The other is reconstruction with no preview. Completing both shows whether you hold a shade better when you can compare, or when you mix it unseen.

work

Work with color.

Put hues in order, then mix a match with three sliders.

Hue Sorting keeps two end tiles fixed and asks you to swap the middle until the gradient is smooth. Color Matching keeps the target visible and lets you drag three sliders until the mix agrees. Sort first so you feel the slope between two anchors; then mix a single target by hand. Ordering is about relative steps. Matching is about landing on one destination. After the pair you can see whether you are steadier at arranging hues or at steering HSL onto a sample that stays on screen.

Before you compare scores

A score on Hue Shuffle is a count of what happened in this browser, on this display, in this room. Brightness, color temperature, night mode, True Tone, and the kind of panel you are looking at all change how close two colors appear. The same round on a phone and a laptop is not the same stimulus.

Room light and viewing angle matter as much as the hardware. A window behind you, a warm lamp, or glare on glossy glass can hide a difference that was obvious a minute earlier. Sit still relative to the screen if you want two runs to be comparable at all.

Fatigue and attention move the result even when the device does not. A long session, a second monitor, or playing while distracted will scatter your answers. Repeating the same game on one device, with similar light, is the only comparison that has much meaning here.

Do not treat another person's score, or a score from a different phone, as a measurement of your vision. These games are for noticing how you judge color in the moment. They are not a medical exam, not a color-blindness test, and not a calibrated lab result. If you only have a minute, remember three things: same device, similar light, no medical story. Everything else on this page expands those three.

Which challenge should you try next?

Compare how this game asks you to look, then open a neighbor if you want a different kind of judgment.

GameWhat you doWhat makes it differentMain focus
Memory StackRebuild an ordered rowYou rebuild a hidden row that grows from two colors to five.Sequence memory
Color MemoryRecall a hidden shadeThe target is gone before you pick from six near-misses.Short-term color memory
Color SequenceRepeat a flashing sequencePads flash in order and a miss ends the run.Temporal color memory
Blind SlidersMatch from memory with no previewPreviews hide, so you mix from HSL numbers only.Blind color reconstruction
Spot the DifferentFind one subtly different tileThe odd tile hides in a growing grid with a shrinking gap.Small color differences
Memory StackSequence memory

Rebuild an ordered row

You rebuild a hidden row that grows from two colors to five.

Color MemoryShort-term color memory

Recall a hidden shade

The target is gone before you pick from six near-misses.

Color SequenceTemporal color memory

Repeat a flashing sequence

Pads flash in order and a miss ends the run.

Blind SlidersBlind color reconstruction

Match from memory with no preview

Previews hide, so you mix from HSL numbers only.

Spot the DifferentSmall color differences

Find one subtly different tile

The odd tile hides in a growing grid with a shrinking gap.

Explore all games

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