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Comment by ChrisMarshallNY | Hacker News Reader

Quite common sense, but not a new issue. "Color Set" books have been sold for decades, and there's a number of sites (I have a few bookmarked [0]-[4]), that have great JS implementations.

But it's a great explanation. I think this is something that everyone should know, so the more material out there, the better.

[0] W3Schools is not everyone's cup of tea, but they have a great section on colors: https://www.w3schools.com/colors

[1] Colorblind design is important. This helps with that: https://www.toptal.com/designers/colorfilter

[2] I've found this tool useful: http://paletton.com

[3] "Clickbaity," but also fairly useful: https://www.colorcombos.com

[4] This is a cool tool: https://www.colorbox.io

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> [1] Colorblind design is important. This helps with that: https://www.toptal.com/designers/colorfilter

I'm colour-blind; I've never known exactly what type (for sure red/green).

I can tell the difference between original/filtered at that link for both protanopia and deutanopia, though they are close. Perhaps that means I have both/a mixture. (They're described there as being anomalous red vs. green cones, so it seems reasonable that I could have anomalous both.)

When it comes to 'colour-blind mode' settings I set my mild annoyance (could you not just pick a friendly default? It's not like I can't see any reds (for example) at all) aside and just pick whichever type is most visually pleasing or easily distinguishable.

If you have a Mac, an app called Sim Daltonism[0] is quite good. I use it for most of my colorblind testing (including browsers). There's also an iOS version[1]. It has a number of CB types; not just the most common three.

[0] https://apps.apple.com/us/app/sim-daltonism/id693112260

[1] https://apps.apple.com/us/app/sim-daltonism/id1050503579

You may have color receptors that are not defective, but too close in activation spectra. If that's the case, then there's a workaround. Block out the light in the spectral overlap, and then the receptors will only activate on separate signals.

https://www.aao.org/eye-health/tips-prevention/do-color-blin...

Thank you for the links!

I find Adobe Color quite helpful to find a palette for visualization [1]. Its been around for years now, although I think the original website was called Adobe Kuler.

For categorical colormaps, I have found the python Glasbey [2] library helpful. Note: the first run can be slow.

[1] https://color.adobe.com/explore For popular themes filter using "View" (right side of the screen under the main banner) and pick "Color Themes" => "Most Popular"

[2] https://github.com/taketwo/glasbey

>W3Schools is not everyone's cup of tea,

Its gotten a lot better over the last few years. It wasn't that long ago I blacklisted their domain from google.

colorhexa.com is my goto for colors. Shows how colors are perceived by colour blind and much more.

Thanks! That's a useful site!

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