While I had pulled a very solid 0.0038 on my phone screen with that challenge going around, I really wanted to see if I could do better with my calibrated screen on my main PC.
Turns out my main screen is better!
What's My JND? 0.0028
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=ARwlKP___993
#WhatsMyJND