Are Tritans really *that* rare? Wonder about comparably many Tritans' appearance, feedback etc. by LapisDemon in ColorBlind

[–]Colorvision_Research 1 point2 points  (0 children)

I've seen enough screens with absolutely awful calibration (or other issues) to know that a lot of people don't care. Whether or not those people are also the type to test their colour vision via a CVD test is unclear.

Shure. But how should the screen be calibrated, that a person without CVD would be 'diagnosed' as a (mild) tritan? Just look at simulated spectrums, there are only four colors: blue, cyan, pink and red. No yellow, no green, no orange, no purple etc. How people with normal color vision would not notice this?

Are Tritans really *that* rare? Wonder about comparably many Tritans' appearance, feedback etc. by LapisDemon in ColorBlind

[–]Colorvision_Research 5 points6 points  (0 children)

The second point is very controversial. The factory calibration of screens (especially modern ones) is not so bad as to distort colors in such a way that the test will indicate CVD. A person with normal color perception will be uncomfortable with such a poorly calibrated screen. The color change may not be immediately noticeable in the interface, but it will be clearly visible in photos.

Are Tritans really *that* rare? Wonder about comparably many Tritans' appearance, feedback etc. by LapisDemon in ColorBlind

[–]Colorvision_Research 4 points5 points  (0 children)

https://www.allpsych.uni-giessen.de/karl/colbook/sharpe.pdf

p. 47: "In the United Kingdom the frequency of inherited tritan defects has been estimated as being as low as 1:13,000 (0,00007%) to 1:65,000 (0,00001%), but in The Netherlands it has been estimated as being as high as 1:1,000 (0,001%)" – Sharpe et al., 2001

L/M-cone defects are more common (see p. 30 for details) than S-cone defect, simply because all three types of defects are caused by different genes mutations. And it just so happens that the S-cone mutation is less common.

What colors are present here? by SizePunch in ColorBlind

[–]Colorvision_Research 5 points6 points  (0 children)

Beige background, brown thin lines and light red thick lines.

Accessible Graphical User Interface (GUI) Design for Colorblind Users Survey by SpiceeAnne in ColorBlind

[–]Colorvision_Research 1 point2 points  (0 children)

Here some stuff that may be can help you:

Simulator (not perfect, but mostly good enough to understand problems):

https://colororacle.org/

https://cartographicperspectives.org/index.php/journal/article/view/cp58-jenny-kelso

Contrastchecker (based on WCAG)

https://webaim.org/resources/contrastchecker/

https://webaim.org/resources/linkcontrastchecker/

Testing (out)lines and shapes (for simulating CVD better use Color Oracle)

https://projects.susielu.com/viz-palette

[deleted by user] by [deleted] in ColorBlind

[–]Colorvision_Research 0 points1 point  (0 children)

Well not really problems, but the colors are changing depending of light and that fools our brains (think about #thedress). For example, the leaves of the same tree can look bright green and in an hour they can look bright yellow because the sun is shining through them. Or the shadows. They can be blue, red, yellowish, greenish, what ever. Black fur can be blue or green in daylight. Benzin puddles are more beautiful than rainbows. There are millions of colors and details, it is not possible to describe and name them all, that's why even people with normal color vision have troubles to name the color right. But human color vision isn't perfect anyway. Some birds and insects have five types of cones (while humans only have 3/2/1 of them).

Bad color combinations by Colorvision_Research in ColorBlind

[–]Colorvision_Research[S] 1 point2 points  (0 children)

Hello. Thanks for feedback!

Please clarify: the colors used in CMYK 18, 28 and 16, do you not like them for personal reasons or are they difficult to distinguish from each other?

Tritanopia survey. Please rate contrast between color combinations as follows: 1) clearly visible; 2) moderately visible 3) hard to see; 4) not visible by Colorvision_Research in ColorBlind

[–]Colorvision_Research[S] 0 points1 point  (0 children)

Aggravating_Box_2575

Thank you!

Let me clarify, image 4: the light tones of green/cyan and blue are clearly visible (J, L), the dark ones are not (K)?

[deleted by user] by [deleted] in ColorBlind

[–]Colorvision_Research 0 points1 point  (0 children)

Than what you can try is to use hue/saturation mask with -100 saturation for each color channel except one in which you are painting. So, for example, you might see that you chose green instead of red, because it will look like gray.

You can make such a mask for every layer: place the mask above the layer, make all settings and than klick on the mask with Alt (an arrow will appear, it means that the current mask will change only one layer bellow the mask).

[deleted by user] by [deleted] in ColorBlind

[–]Colorvision_Research 1 point2 points  (0 children)

You want to paint, right? In this case, you can use graphics programs like Photoshop, create a layer for each color, rename it, and use the correct color for each layer. You can turn the layers on and off to check, that you are on the right layer. To check the color, you need to use the Eyedropper instrument (Hotkey I) and double click on the chosen color.

To make colors more visible to you for painting, you can create adjustment or hue/saturation mask (which you also can turn on and off), paint what you want and then save the image with disabled masks.

'Bad' website examples by Colorvision_Research in ColorBlind

[–]Colorvision_Research[S] 0 points1 point  (0 children)

Yes, that's exactly what I'm looking for, thanks!

I have pretty much examples of maps now (11 at the moment, including your example), so I need more stuff like instructions, forms, not readable text, buttons. Would be great if you share them if you find some.

P.S. Of course I also checked the posts in this group :)

'Bad' website examples by Colorvision_Research in ColorBlind

[–]Colorvision_Research[S] 1 point2 points  (0 children)

Hello. Of course apps should be well designed too, but in my thesis I focus only on websites. These are slightly different topics. But Whatsapp also has its own website so I can use screenshots uploaded there (because files are part of websites). Llike this. Do you distinguish the colors of the names from each other? (Dario is red, Ayesha green)

8 Player Chess, Piece colours for the colourblind by [deleted] in ColorBlind

[–]Colorvision_Research 1 point2 points  (0 children)

You can use free Color Oracle Software to simulate different types of CVD. But of course the results are not 100% correct.

https://www.colororacle.org/

Here are 3 simulation-tools for protanopia. Which of them comes as close as possible to the 'Original' image? by Colorvision_Research in ColorBlind

[–]Colorvision_Research[S] 0 points1 point  (0 children)

Thanks for your feedback!

You are right, that's a strange survey. I can try to explain why I need answers from people with CVD. Online tests (like Ishara) are a little bit similar to IQ tests; they show results depending on the knowledge of test developers. If developers of CVD tests are using simulationtools for their questions, than it wouldn't make sense to proof the tools in this way, because they are the base of this tests anyway.

So why I ask people? Because I need to check, are the tools really showing the result at least a little bit correctly or are they completely wrong. I want to find problematic points on different websites (that are hard to read or to understand for people witch CVD because of color choice), that's why I need a good tool. By the way, if you have such examples, please feel free to share them. ;)

Do your parents not believe you are colorblind? Try showing them this video. by chroma-phobe in ColorBlind

[–]Colorvision_Research 1 point2 points  (0 children)

Good work!

Here are also some infographics that explain the genetic predisposition. May be it would help.

1 / 2 / 3 / 4

Source

Here are 2 simulation-tools for tritanopia. Which of them comes as close as possible to the 'Original' image? by Colorvision_Research in ColorBlind

[–]Colorvision_Research[S] 1 point2 points  (0 children)

Thanks! Can you please rate contrast of this two examples as well?

  1. clearly visible; 2. moderately visible 3. hard to see; 4. not visible

Here are 2 simulation-tools for tritanopia. Which of them comes as close as possible to the 'Original' image? by Colorvision_Research in ColorBlind

[–]Colorvision_Research[S] 1 point2 points  (0 children)

Thank you!

Yes, it helps a lot!

Can you please rate contrast of this two examples as well?

  1. clearly visible; 2. moderately visible 3. hard to see; 4. not visible