> Are the color-blindness simulators in Firefox devtools good enough to reproduce your experience?

I have honestly not used them, sorry.... (I don't make GUIs).

I am looking at the docuymentation, and I am a bit disappointed though. By far the most common issue is contrast loss like they say: https://developer.mozilla.org/en-US/docs/Tools/Accessibility...

The condition to not see one color completely is incredibly rare, and not seeing any colors even more so. By in large the issue is constrast loss.