For anyone working on a Mac, I highly recommend Sim Daltonism. It gives you an interactive display on your Mac that you can place over any section of your screen to simulate what it looks like to a colorblind person. It simulates several different types of colorblindness. I have a friend who is colorblind, and to the best of our mutual understanding, it is accurate.

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

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y1n0 a day ago | parent [-]

Thanks for the recommendation. I tried it out as a colorblind person. I'm always looking for one of two things -- tools that will help me differentiate stuff I see on graphs and charts (endlessly frustrating) and tools that will let me show other people how I see.

My problem is that I've never found a colorblind emulator that matches my colorblindness. I'm just red-green deficient, so nothing exotic.

My test for these emulators is whether I see a difference between the original unmodified image and the emulated colorblind image, and I always do. Even with this one. So that tells me that the emulation doesn't really match what I personally see or I wouldn't be able to tell the difference.

	▲	AlotOfReading 21 hours ago \| parent \| next [-]
		I haven't used sim daltonism, but most of these simulators assume your opsins are fully non-functional. You usually have multiple copies of the relevant genes and most of them need to be non-functional for complete colorblindness. Most people are only partially colorblind as a result, from what I understand. Additionally, mutations can shift your spectral sensitivity curves away from "human normal", which further affects color perception.
	▲	razorbeamz 19 hours ago \| parent \| prev [-]
		The thing is though, no two people's colorblindness is exactly the same, so this is difficult to tune.