For those who want to test their perception of colour, I made a little game called "What's My JND"

https://www.keithcirkel.co.uk/whats-my-jnd/?r=ARUjKP__-ve-

What's My JND?

Find your Just Noticeable Difference in colour perception. How small a colour difference can you actually see?

@keithamus What's My JND? 0.0032
@johannes it's a great score! The best I've seen is 0.0018.

@keithamus Switched screens, and managed to get it down to 0.0026. Maybe I need to clean the screen.

Addictive 😅

@keithamus Down to 0.00057 🎉