Aphantasia and Color Memory: When You Can't Picture a Shade

Some people have no mind's eye at all. Here is what that does, and does not do, to memory for color.

Short answer: aphantasia is the inability to voluntarily conjure a visual mental image, and it affects roughly one person in twenty-five. It does not stop people from recognizing colors, naming them, or judging whether two colors match. What it changes is memory that would normally lean on a picture in the mind: recalling a color after it is gone, drawing a remembered scene from color, and, in the most careful lab tests, the finest edge of precision in visual working memory. The picture in your head, it turns out, is doing more quiet work than most people notice, right up until it is missing.

What aphantasia actually is

The term was coined in 2015 by a team led by the neurologist Adam Zeman, building on the case of a patient known as MX who lost the ability to visualize after a minor surgical procedure, and on a subsequent cohort of twenty-one people who reported never having had voluntary visual imagery at all, a pattern the researchers called congenital aphantasia. Ask someone with typical imagery to picture an apple and they report something like a faint, private image: a red shape, roughly apple-sized, that they can rotate, inspect, and compare against another remembered apple. Ask someone with aphantasia the same question and they report nothing to look at, only the abstract knowledge that apples are red and roughly round. They are not blind, not lacking in creativity, and not being difficult. The visualizing step of the process is simply not producing a percept.

This is a spectrum rather than a strict switch. Researchers commonly measure imagery vividness with a self-report tool called the Vividness of Visual Imagery Questionnaire, and studies that surveyed representative samples in the UK and the US put congenital aphantasia, defined as the complete absence of imagery, at under one percent of people, while a broader band that includes very faint or patchy imagery reaches roughly three to four percent. A large international replication across many labs found a comparable pattern, which matters because it means the condition is not a single lab's artefact: whatever aphantasia is, it shows up reliably wherever careful researchers look for it.

Does aphantasia change how you see color?

No, and this is the finding that most surprises people who first hear about aphantasia. Basic color perception, the wiring in the retina and early visual cortex that lets you tell one hue from another, is untouched. People with aphantasia pass ordinary color vision tests, discriminate hues normally, and can match a swatch to a reference just as accurately as anyone else while both are visible. If you sat someone with aphantasia in front of the site's own discrimination game, comparing two colors that are both on screen at once, their performance would look unremarkable. The deficit, where there is one, only shows up once the color has to be held in mind without a picture to hold it with.

One of the clearest demonstrations of this used an indirect, physiological test rather than a questionnaire. In work led by Rebecca Keogh and Joel Pearson, researchers exploited an effect called binocular rivalry priming, in which imagining a pattern before a rivalry test biases which of two competing images a viewer sees first. In people with typical imagery, imagining a red-striped pattern reliably tilts perception toward red stripes a moment later. In people who report aphantasia, that priming effect was dramatically reduced or absent, even though their eyes and early visual system worked normally in every other respect. This matters because it does not depend on the participant accurately describing their own inner experience: the visual system itself behaved as though the imagined picture were weak or missing.

What happens to color once it has to be remembered

Memory for color, once nothing is left on screen to compare against, is where the differences concentrate. A detailed single-case study by Christianne Jacobs, Dietrich Samuel Schwarzkopf and Juha Silvanto tested a woman with lifelong aphantasia on standard visual working memory tasks, in which a small set of colored items is briefly shown, hidden, and then probed after a delay. Her memory for color was close to typical on easy trials, but on the hardest trials, the ones demanding the finest precision, her performance fell measurably behind matched controls. Just as striking, she did not know it: her confidence in her own answers did not track her actual accuracy the way it does in typical imagers, suggesting that people without a mind's eye may also lack the usual introspective signal that tells you when a memory is shaky.

A larger study led by Wilma Bainbridge took a different approach entirely: instead of a forced-choice memory test, it asked sixty-one people with aphantasia and a matched group of typical imagers to look at everyday scenes and then draw them from memory. The drawings were scored in detail for object content, spatial layout and, relevantly here, color. People with aphantasia drew scenes with markedly fewer object details and far less color information than controls, and they compensated by writing color words directly onto the page, such as labelling a couch "brown" rather than shading it in. Strikingly, their spatial layout, where each object sat relative to the others, was just as accurate as the control group's. The pattern points to two separable memory systems: one for where things are, which does not obviously need a picture, and one for what things looked like, including their color, which leans much more heavily on visual imagery.

A verbal workaround, not a blank space

None of this means people with aphantasia are worse at color in general, or that their memory is simply broken. Across these studies, a consistent theme is compensation through language: labelling a shade as "rust" or "sage green" rather than holding onto a visual impression of it. Verbal, categorical memory for color is exactly the kind of memory our page on color memory and recall describes for typical imagers too, the drift toward a prototype rather than the exact shade; people with aphantasia appear to lean on that categorical route more heavily and more consistently, likely because the alternative, a fine-grained sensory trace, is not available to fall back on. It is a different strategy for a task everyone is doing, not a missing ability.

This also reframes what our page on color and working memory calls capacity and precision limits. Those limits exist for everyone: a small number of colors held with usable fidelity, degrading further with delay and distraction. For most people, visual imagery is one of the resources that helps hold a color in mind across a delay. Take that resource away and the same task can be completed, but it shifts weight onto verbal labels and onto whatever coarse, gist-level trace survives without a picture, which is consistent with the pattern of intact easy trials and impaired hard trials seen in the precision study above.

What this would mean for a reproduction game

Huekle's own games map onto this distinction fairly cleanly. A discrimination task where two colors are visible at the same time, comparing swatches side by side, should not be affected by aphantasia at all, since nothing needs to be held in mind once the color disappears. A reproduction task, where a color is shown, taken away, and then rebuilt from a color wheel after a pause, is exactly the kind of task the research above says should be harder without a mind's eye, particularly as the target gets subtle or the delay stretches out. Nobody has run a study on aphantasia using a game like Hueecho specifically, so this paragraph is a reasoned extension of the research rather than a reported result, and it should be read that way. If you have aphantasia and you notice your reproduction scores sit further behind your discrimination scores than the guide on the just-noticeable color difference would predict, verbalising the color deliberately, "warm mid-gray, slightly green," before it disappears is the strategy the drawing study suggests your visual system is already reaching for on its own.

An honest note on limits

Two things are worth being careful about. First, sample sizes in this literature are still modest by the standards of large behavioral science; the single-case precision study is exactly that, a single case, and the drawing study's sixty-one participants, while large for this specific field, is not enough to rule out that some aphantasic individuals show no color memory difference at all. Second, aphantasia is measured mostly by self-report questionnaires, and the field is still working out how well those track the objective, physiological measures like binocular rivalry priming used in the strongest studies. Treat the specific numbers here as a snapshot of an active, moving research area rather than a settled last word.

Keep reading

• Color memory and recall: the categorical drift that everyone's color memory shows, aphantasia or not.
• Color and working memory: capacity and precision limits in typical imagers.
• The just-noticeable color difference: the perceptual floor that any memory task sits on top of.

Sources: Zeman, A., Dewar, M. and Della Sala, S. (2015), Lives without imagery: congenital aphantasia, Cortex 73, 378-380; Keogh, R. and Pearson, J. (2018), The blind mind: no sensory visual imagery in aphantasia, Cortex 105, 53-60; Jacobs, C., Schwarzkopf, D. S. and Silvanto, J. (2018), Visual working memory performance in aphantasia, Cortex 105, 61-73; Bainbridge, W. A., Pounder, Z., Eardley, A. F. and Baker, C. I. (2021), Quantifying aphantasia through drawing: those without visual imagery show deficits in object but not spatial memory, Cortex 135, 159-172; Dance, C. J., Ipser, A. and Simner, J. (2022), The prevalence of aphantasia (imagery weakness) in the general population, Consciousness and Cognition 97, 103243; Wright, J. et al. (2024), An international estimate of the prevalence of differing visual imagery abilities, Frontiers in Psychology 15.