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

[hp@mastodon.tmm.cx]

@keithamus @piggz well I guess then I'm sorry about my annoyingly good score?

[piggz@fosstodon.org]

@hp @keithamus How does the number of rounds work, i see people doing different numbers?

[keithamus@indieweb.social]

@piggz @hp There are 6 "rounds"/steps. If you're at round 6 and get one wrong, it'll back off to round 5, to gain confidence that you didn't just fluke it. Each round lowers the threshold. But there's a cap of 40 trials.

[ronflaix@mastodon.gamedev.place]

@keithamus https://www.keithcirkel.co.uk/whats-my-jnd/?r=AVQgJv__-znc
Damn, it made me realize how much uneven my main work screen is, lol.
EDIT: oops, wrong url

[lisyarus@mastodon.gamedev.place]

@keithamus What's My JND? 0.0038
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AXgfKP___DbL

I guess me being a graphics programmer pays off. Though at some point the dust on my monitor has more contrast than the colors

[pointlessone@status.pointless.one]

@keithamus Some time past half I had to clean my screen as it was hard to tell if it was an edge or just a smudge. Path 2/3 I swear some colours were like one degree away in a single channel, ain't no way anyone can see that.

What's My JND?

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

(www.keithcirkel.co.uk)

[loke@functional.cafe]

@keithamus What's My JND? 0.0028
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=ARUiKP__93yv
Now, I suspect the monitor you are using can have an impact. I was using my phone, which is a Samsung Galaxy S24, and I increased brightness to about 85% in a not very bright room. Also, in one of my correct answers, I was bet unsure, and my guess was quite off, but counted as correct, so probably some luck there.

[peturdainn@mastodon.social]

@keithamus
What's My JND? 0.0044
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AbchKP__7w2_

[catawu@mastodon.social]

@lisyarus @keithamus I found that when the response flashed at me it was like a glare stain and took forever for my eyes to try and adjust (it’s nighttime here). I have glare sensitivity and have to wear shaded lenses even indoors depending on the light. I did ok, I think, for an old lady.

[emkingma@mstdn.social]

@keithamus I'm kind of confused as to what you're meant to input when you notice the difference?

[keithamus@indieweb.social]

@emkingma you're supposed to click the area where you think the background transitions from one colour to the next. It could be clearer, but I am not sure how best to make it clearer.

[pixretro@mastodon.social]

@keithamus What's My JND? 0.0047
Can you beat it? https://www.keithcirkel.co.uk/whats-my-jnd/?r=AdUfKP__7zSz

Not a true representation as i realised i could move the wondow around my screen and the colours changed... lol!! Might be time for a new monitor...

[karolherbst@chaos.social]

@keithamus got 0.0018, but I'm also on an HDR display and was wondering if that helps with getting a lower value there.

[codecat@meow.social]

@keithamus This was fun. My partner got 0.0018!

[lukew@toot.wales]

@keithamus @joface I pulled out a cloth and wiped my screen down to get the optimal score I could glad it's not just me

[keithamus@indieweb.social]

@karolherbst they're all in sRGB so HDR _shouldn't_ matter, but having a good display which can represent all of sRGB certainly will matter.

[idgs@mas.to]

@keithamus Fun! And interesting!

[emkingma@mstdn.social]

@keithamus thanks, that's all I needed to know.

Mine's 0.0062
https://www.keithcirkel.co.uk/whats-my-jnd/?r=AmghKP__7l-8

[chris@nutmeg.social]

@keithamus Well I guess it's a draw.

The dirt streaks on my screen kept throwing me off while searching for the disturbance in the force.

[harry_wood@en.osm.town]

@keithamus @emkingma I feel like it needs a little instruction "Click on the line between colours" displayed before your first click. I was confused until I'd got the first one wrong.