0.0042 apparently https://www.keithcirkel.co.uk/whats-my-jnd/?r=AaYkKP___-u-

There's was 2 or 3 where i had no idea, guessed and was a way off.

There's was 1 where i did a hail Mary and got it. It was interesting how some even towards the end were really obvious and others were really subtle - I'd say I did better with purple tones and worst with the blue / greys.

I'm color blind, and not even a little bit, but I scored 0.0084. I've noticed before that my perception of contrast is slightly better (than that of the people I ever compared it with; admitteldly, that's only a handful, but they weren't colorblind).

What's My JND? 0.0032 Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AUEjKP___831 #WhatsMyJND

I need a better display for sure :)

Discussed here: https://news.ycombinator.com/item?id=47321188

“Show HN: What's my JND? – a colour guessing game” 54 points | 8 days ago | 62 comments

That mostly depends on the quality of your screen.

Only with chrome devtools :)