Hi. Please play this amazing JND color game my friend Keith made and see how good you/your displays are at differentiating between similar colors. https://www.keithcirkel.co.uk/whats-my-jnd/?r=filmgirl
What's My JND?

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

@film_girl I forget my score, but apparently it was incredibly... average. I'm OK with that.
@xgranade I worked very hard to get the high score I got last night and my eyes hurt after as a result so average is prob smarter, all things considered!

@film_girl That was interesting!

What's My JND? 0.0046
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AcofJP__7d1w

What's My JND?

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

@armadsen @film_girl I got the same score, nice.
@film_girl 0.0042 which surprised me.
@film_girl And 0.0045 from a real monitor, not my phone. Weird.

@film_girl What's My JND? 0.0069.
https://www.keithcirkel.co.uk/whats-my-jnd/?r=ArYfKP_9_b8D

Do different displays make certain areas of the spectrum easier or harder to distinguish?

What's My JND?

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

@film_girl that was fun!

What's My JND? 0.0028
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=ARUhJv__fvvM

What's My JND?

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

@film_girl Ok, friends and I are playing now, but we don't know what the score number means. Is a bigger number better or a smaller number?
@MLE_online smaller is better. You want to get as many correct as possible out of 40!

@film_girl
What's My JND? 0.0214
Average.

Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=CF8YHv_7cew

What's My JND?

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

@film_girl
So I tried it again. First time was on my OLED pixel phone. This time was my desktop monitor:
What's My JND?

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

@film_girl Hey i didnt do too bad, that was fun
@film_girl Ooh neat!

@film_girl ... Oof at the reasoning blog post though

Minifiers should not be messing with your colors. That's not the job of a minifier. If it does that it's broken. (Unless it's specifically for that, I guess, so like, something you'd pick intentionally to do that.)

@film_girl Whoo. That was hard but fun. Turning my phone sideways sometimes helped

What's My JND? 0.0039
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AYUhKP__33R9

What's My JND?

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

@film_girl tried it 3 times – twice on an iPad Pro, once on MB Air. Got worse each time, ending at .012 or so
@film_girl After cheating with the Digital Color Meter on the Mac, I got it down to .0032…
What's My JND?

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

@film_girl Tried again and got 0.0026. Put my brightness at max to do that. 250 nits. 6-bit screen.
https://www.keithcirkel.co.uk/whats-my-jnd/?r=AQgiKP__33P8
What's My JND?

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

@film_girl What's My JND? 0.0049
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AeUfKP__w_F9

On a cheap laptop.

What's My JND?

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

@film_girl 0.0021. I wish I had an OLED screen to try this with. https://www.keithcirkel.co.uk/whats-my-jnd/?r=ANYjKP___bvP
What's My JND?

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

@film_girl What's My JND? 0.0135
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=BUIgKP__TdX9
iPhone 15 pro max Display
What's My JND?

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

@film_girl oh right, i have a smartphone: 0.0016. unfortunately, input is not as precise on a touchscreen so it read one of my taps way off :(
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AJsiKP___fHd
What's My JND?

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

@film_girl On my iPhone 17 Pro. It would have been much worse before cataract surgery.

@film_girl

Cheap, 10 year old whatever-monitor I have here. Out of three attempts, the best was 0.0054, which doesn't seem that impressive when seeing some of the other results.

I blame the monitor.

@film_girl I got 0.0043 overall. But the threshold of what delta-E I could see seemed to be different depending on the colours involved. Nailed some all the way down to 0.0032, while others I couldn't distinguish at 0.0080.

Whether that's a weirdness of my eyes, or my monitor being badly calibrated, or a bit of both, I couldn't say.

[edit to add: or it could be OKLAB not being perfectly perceptually uniform, I suppose. I would suspect it's not quite as uniform as DE2k, but would love to have data to back that up one way or the other]

@film_girl Thanks for sharing!

What's My JND? 0.0041
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AZkdIv__3N3A

What's My JND?

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

@film_girl got this on my ancient Motorola g30, guess it's not so bad though about ten of the colors had no separation on it
@bangskij yeah, I’ve had worse scores on runs in my iPhone 17 Pro Max, so I think that’s actually an incredible score given the hardware!
@film_girl are there game instructions?
@film_girl first try. But my dad was colorblind so I suspect I have the extra cones.

@film_girl 0.0062  

had to start moving my head around because the differences in brightness from viewing angle and the visual noise of my monitor were throwing me off.

Despite what the site says about my result, I actually tend to name colors very coarsely, to the annoyance of others. I don't know which reds are crimson or which yellows are primrose. Those words tend to fall into the "so specific they're vague" territory for me, like a sign that says "No Ambling". I even often disagree with people about where the line between blue and purple, purple and red, etc. are.

https://www.keithcirkel.co.uk/whats-my-jnd/?r=AmchKP__X_m8

What's My JND?

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

Weirdly did better on my older monitor, the one that I'd expect to have worse color accuracy. But maybe that's why I did better.

https://www.keithcirkel.co.uk/whats-my-jnd/?r=AdYhJv__t9-c

What's My JND?

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

What's My JND?

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

@film_girl
That was fun! The hints were jolly 😛
@film_girl my JND is 0.0036. on a MSI MP275Q monitor
What's My JND?

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

@film_girl Nice Game! Thanks for sharing. I enjoyed ist! My JND: https://www.keithcirkel.co.uk/whats-my-jnd/?r=AZkcIn__9ztA
What's My JND?

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

@film_girl Fun! On a 2020 MacBook Air (M1) using Chrome, my JND was 0.0046 https://www.keithcirkel.co.uk/whats-my-jnd/?r=Ac8jKP___3y3
What's My JND?

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

@film_girl Ooft. By the end of it I felt like I was operating on vibes like macro data refinement. 0.0037 though on my Philips monitor with decent P3 gamut.

@film_girl 0.0040, lenovo t460p running firefox under linux(i use arch btw) with it's second replacement screen, only one of which was my fault.

_also sorry lol had to throw the btw joke in_