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.
Yeah, some non-colorblind people mistakenly think we can "fix" it by mapping trouble colors to different colors because they fundamentally misunderstand that we always see like this.
https://apps.apple.com/us/app/sim-daltonism/id693112260
If it works in grayscale, it should work for basically all colorblindness types.
> The post title comes from “Colorblind” by Super Furry Animals, a B-side to their Do Or Die single.