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Take the test yourself The Ishihara plates, explained Thirty-eight plates, each built to reveal a different way of seeing color. On some of them, seeing nothing at all is the correct answer.
How to look Arm's length, in good light About 3 seconds per plate, then answer Turn off Night Shift, True Tone and any color filters A screen is an illustration, not a medical test.
Plate 1
Demonstration Everyone can read this plate, even people with no color vision at all. It shows what the test asks of you. Someone who cannot read it has a problem other than color vision.
How these plates work →
Plate 1 · Demonstration
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 12 Protan red 12 Deutan green 12 Tritan blue same as normal No color vision 12
To cones, the orange 12 is exactly as bright as the blue-gray dots. To rods it is less than half as bright. So even people who see only with rods read a dark 12.
How this works →
Plates 10–17
Vanishing plates A number that disappears for red-green color blindness. Seeing nothing is not a failure to try: it is the answer these plates are designed to get.
How these plates work →
Plate 10 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 2 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
Each orange in the “2” has a twin in the background that red-green color blindness cannot tell apart, so the 2 simply dissolves. Seeing nothing is the designed answer.
How this works →
Plate 11 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 6 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
A website recolored this plate's dots and passed them off as plate 3: one of the fakes found while checking the plates.
How this works →
Plate 12 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 97 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
The vanishing plate that people with normal vision miss most often: in one study only about three in four read it correctly.
How this works →
Plate 13 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 45 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
The same design appears on a loose Ishihara plate from 1917–1959 in the Wellcome Collection.
How this works →
Plate 14 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 5 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
One of the four plates (10, 13, 14 and 17) that the hidden-digit plates are compared against when scoring.
How this works →
Plate 15 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 7 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
Blue and yellow dots scattered across the plate draw a red-green color blind eye away from the little red-green difference that is left.
How this works →
Plate 16 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 16 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
Like every vanishing plate, the figure exists only in red-green. Without it, the plate is an even field of dots.
How this works →
Plate 17 · Vanishing
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 73 Protan red nothing Deutan green nothing Tritan blue same as normal (not detected) * No color vision nothing
* inferred from how the plate works, not measured.
The second-hardest vanishing plate for normal vision: about three in four read it correctly in one study.
How this works →
Plates 18–21
Hidden-digit plates The reverse: a number that red-green color blind people can read and most people with normal vision cannot. The least reliable group of the test.
How these plates work →
Plate 18 · Hidden digit
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision nothing Protan red 5 Deutan green 5 Tritan blue probably nothing, like normal vision * No color vision nothing
* inferred from how the plate works, not measured.
The “5” is written in blue, with pale, washed-out dots. Bold red-green stripes printed over it capture normal vision. In the blue channel alone, anyone can see it.
How this works →
Plate 19 · Hidden digit
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision nothing Protan red 2 Deutan green 2 Tritan blue probably nothing, like normal vision * No color vision nothing
* inferred from how the plate works, not measured.
Like plate 18: a digit carried by blue-yellow, hidden from normal vision by red-green camouflage.
How this works →
Plate 20 · Hidden digit
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision nothing Protan red 45 Deutan green 45 Tritan blue probably nothing, like normal vision * No color vision nothing
* inferred from how the plate works, not measured.
Many people with normal vision read the hidden digits too, and only about half of red-green color blind people do. So the booklet counts them only if they are read more easily than the vanishing plates.
How this works →
Plate 21 · Hidden digit
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision nothing Protan red 73 Deutan green 73 Tritan blue probably nothing, like normal vision * No color vision nothing
* inferred from how the plate works, not measured.
A website serves a different, fake design as plate 21. The genuine one also appears on a loose Ishihara plate from 1917–1959.
How this works →
Plates 22–25
Classification plates Two digits at once: one survives for protans, the other for deutans. In mild cases both may show, one clearer than the other.
How these plates work →
Plate 22 · Classification
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 26 Protan, strong red 6 Protan, mild red 6, 2 faint Deutan, strong green 2 Deutan, mild green 2, 6 faint Tritan blue same as normal (not detected) * No color vision indefinite
* inferred from how the plate works, not measured.
Both digits are as light as the grays around them. The red “2” survives for deutans, the purple “6” for protans.
How this works →
Plate 23 · Classification
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 42 Protan, strong red 2 Protan, mild red 2, 4 faint Deutan, strong green 4 Deutan, mild green 4, 2 faint Tritan blue same as normal (not detected) * No color vision indefinite
* inferred from how the plate works, not measured.
Deutans keep the 4, protans the 2. The same design appears on a loose Ishihara plate from 1917–1959.
How this works →
Plate 24 · Classification
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 35 Protan, strong red 5 Protan, mild red 5, 3 faint Deutan, strong green 3 Deutan, mild green 3, 5 faint Tritan blue same as normal (not detected) * No color vision indefinite
* inferred from how the plate works, not measured.
Deutans keep the 3, protans the 5. A fake “35” found online is drawn on plate 23's dots.
How this works →
Plate 25 · Classification
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
What do you see?
Skip, show the answer I see no number
Type every digit you see. Seeing no number is a real answer on some plates.
Normal vision 96 Protan, strong red 6 Protan, mild red 6, 9 faint Deutan, strong green 9 Deutan, mild green 9, 6 faint Tritan blue same as normal (not detected) * No color vision indefinite
* inferred from how the plate works, not measured.
Deutans keep the 9, protans the 6. About two in five mild cases see both digits, and can only be told apart by which one looks clearer.
How this works →
Plates 26–38
Tracing plates For people who cannot read numerals. Follow the winding line between the two × with your eyes.
How these plates work →
Plate 26 · Tracing · classification
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision the purple and the red line Protan, strong red the purple line only Protan, mild red both lines, the purple one easier Deutan, strong green the red line only Deutan, mild green both lines, the red one easier Tritan blue same as normal (not detected) * No color vision not stated in the booklet
* inferred from how the plate works, not measured.
Two lines start at the two × on the left: a red one, which deutans keep, and a purple one, which protans keep.
How this works →
Plate 27 · Tracing · classification
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision the purple and the red line Protan, strong red the purple line only Protan, mild red both lines, the purple one easier Deutan, strong green the red line only Deutan, mild green both lines, the red one easier Tritan blue same as normal (not detected) * No color vision not stated in the booklet
* inferred from how the plate works, not measured.
Like plate 26, but here the red line is the lower one.
How this works →
Plate 28 · Tracing · hidden line
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision nothing Protan red traces the line Deutan green traces the line Tritan blue probably nothing, like normal vision * No color vision nothing
* inferred from how the plate works, not measured.
The tracing version of the hidden-digit plates: normal vision sees scattered dots, red-green color blindness finds a line.
How this works →
Plate 29 · Tracing · hidden line
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision nothing Protan red traces the line Deutan green traces the line Tritan blue probably nothing, like normal vision * No color vision nothing
* inferred from how the plate works, not measured.
Like plate 28: a line hidden from normal vision.
How this works →
Plate 30 · Tracing · vanishing line
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision the bluish-green line Protan red cannot follow it, or follows a different line Deutan green cannot follow it, or follows a different line Tritan blue unknown No color vision not stated in the booklet
The tracing version of the vanishing plates: a bluish-green line that red-green color blindness loses, or leaves for a different path.
How this works →
Plate 31 · Tracing · vanishing line
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision the bluish-green line Protan red cannot follow it, or follows a different line Deutan green cannot follow it, or follows a different line Tritan blue unknown No color vision not stated in the booklet
Like plate 30: the bluish-green line vanishes for red-green color blindness.
How this works →
Plate 32 · Tracing · vanishing line
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision the orange line Protan red cannot follow it, or follows a different line Deutan green cannot follow it, or follows a different line Tritan blue unknown No color vision not stated in the booklet
An orange line that red-green color blindness cannot follow, or follows off course.
How this works →
Plate 33 · Tracing · vanishing line
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision the orange line Protan red cannot follow it, or follows a different line Deutan green cannot follow it, or follows a different line Tritan blue unknown No color vision not stated in the booklet
Like plate 32. This line ends at the bottom right, so its second × is there.
How this works →
Plate 34 · Tracing · transformation
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision bluish-green to yellowish-green Protan red bluish-green to purple Deutan green bluish-green to purple Tritan blue unknown No color vision nothing
The line changes partner. Normal vision joins bluish-green to yellowish-green; red-green color blindness joins bluish-green to purple.
How this works →
Plate 35 · Tracing · transformation
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision bluish-green to yellowish-green Protan red bluish-green to purple Deutan green bluish-green to purple Tritan blue unknown No color vision nothing
Like plate 34: two different routes from the same start.
How this works →
Plate 36 · Tracing · transformation
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision purple to orange Protan red purple to bluish-green Deutan green purple to bluish-green Tritan blue unknown No color vision nothing
Normal vision joins purple to orange; red-green color blindness joins purple to bluish-green.
How this works →
Plate 37 · Tracing · transformation
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision purple to orange Protan red purple to bluish-green Deutan green purple to bluish-green Tritan blue unknown No color vision nothing
Like plate 36: two different routes from the same start.
How this works →
Plate 38 · Tracing · demonstration
See it asa model of other people's color vision
Normal Deutangreen Protanred Tritanblue No colorrods only
Strength Mild Strong
deutan and protan only Take it apartone color channel changed, as in an image editor
Remove Red Green Blue Only Red Green Blue
Showing: Normal
Can you follow a line between the two ×?
Trace the line I see no line
Skip, show the answer
Trace every line you can follow
Done Undo Clear Cancel
Draw from one × to the other with a mouse, a finger or a pen. While you draw, the plate doesn't scroll the page. Cancel puts the plate back as it was.
Was one line harder to follow?
About the same Line A was harder Line B was harder
A and B are marked on your two lines.
Normal vision traces the line Protan red traces the line Deutan green traces the line Tritan blue same as normal No color vision not stated in the booklet
The tracing version of plate 1: an orange line on blue-gray that everyone can follow, even with rods only.
How this works →
Your result
Your result appears here after plate 38.
Not a medical diagnosis. A screen shows these colors only approximately. If you have any doubt, see an eye doctor (ophthalmologist) or an optometrist, who can test you with the printed plates and an anomaloscope.
The score: plates 1–21 17 or more: normal · 13 or fewer: red-green color blindness Red-green color blindness In between Normal 0 13 14 16 17 21 On plates 18–21, only the red-green digit counts against you, and only if you did not read its partner (14, 10, 13, 17) either; any other answer counts as normal. Tap a tile to see the plate.
Which type: plates 22–25not counted in the score Strongone digit only Mildboth, one fainter Protan Deutan
Both equally clear
Other answers
Your traces: plates 26–38 not counted in the score Share your answers Start over
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Your answers are inside the link. Nothing is sent to this site: anyone you give the link to sees every answer and this result.
Why only plates 1–21 count ↓
After the plates
What your answers may mean How the booklet scores it Only plates 1 to 21 are scored. Reading 17 or more of them the normal way means normal color vision. Reading 13 or fewer means red-green color blindness. A score of 14 to 16 is rare, and needs other tests to decide.
The hidden-digit plates 18 to 21 count only if you read them more easily than plates 10, 13, 14 and 17. Plates 22 to 25 then tell protan from deutan.
Why only plates 1 to 21 count Plates 22 to 25 sort someone who has already failed into protan or deutan, and strong or mild. They can't tell mild color blindness from normal vision, because both read the two digits. They are also the least reliable plates: in one study, 18% of protanopes saw neither digit, and about 40% of mild cases could be sorted only by which digit looked clearer.
Plates 26 to 38 replace the numbers for people who can't read them, such as young children, who trace the line with a brush. Each one repeats a numeral plate, so the booklet scores only plates 1 to 21.
Not a diagnosis A screen shows these colors only approximately, and the real test needs good daylight, the printed book and an examiner. If the plates surprised you, an eye doctor or optometrist can test you properly, and an instrument called an anomaloscope can tell how strong it is.
How the test works → How colors hide →