This takes something as nerdy as decimal places in CSS colors and turns it into a fun, practical read. It feels like you’re being walked through the rabbit hole by a friend who’s done way too much homework, then hands you a few simple rules you can actually remember and use.
If 0.02 is the JND of deltaEOK, how come everybody is getting results an order of magnitude smaller? Even the author himself (at https://www.keithcirkel.co.uk/too-much-color/) says they get 0.0028, but never elaborate on the significance of that result.
not knowing anything about color, i will admit i am a bit confused. i scored 0.0034 and was told "if you're not already calibrating displays for a living, you're leaving money on the table". which, to me, implied i did quite well!
but, reading the scores posted here, most people are doing a lot better than me. i doubt all of us are crazy good...
so, i assume the front page is a typo: "most people land around 0.02" (should be 0.002, not 0.02)? if yes, then i am back to not understanding the message i got about calibrating displays, because i did quite a bit worse than 0.002.
edit: nerd-sniping myself a little bit. but it appears (stressing: i know nothing) the "0.02" is accurate, but calculated by showing someone two colors and asking "are these different" until the person answers the question correctly 50% of the time. which is a different question than "where, precisely, is the line between these two colors". with the different question, it ends up compressing the result down by about an order of magnitude.
Nice job. Kind of reminds me of this one which increases the number of squares with the odd-one out becoming more subtle as you progress further in the game, but I prefer your sliding mechanic better for this kind of game.
This is fun! I just played once and got 0.0016, which it says is "absurdly below the theoretical limit"...
Okay, tried again and got 0.0034 which is still says is beyond the human limit! I'll have to give this to my mum because we often argue about colours and I suspect she might be a tetrachromat.
This test is subject to the display regime on which it's presented. A given display may hide or amplify differences due to lack of conformance with the color space for the test data.
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[ 2.7 ms ] story [ 59.2 ms ] threadVery addictive, kudos to the dev
Here's the related article on how much accuracy is really needed in CSS values. https://www.keithcirkel.co.uk/too-much-color/
I tried it on a recent Pixel with brightness set to two-thirds, and this is my result:
https://www.keithcirkel.co.uk/whats-my-jnd/?r=ArggKP__c4_b
not knowing anything about color, i will admit i am a bit confused. i scored 0.0034 and was told "if you're not already calibrating displays for a living, you're leaving money on the table". which, to me, implied i did quite well!
but, reading the scores posted here, most people are doing a lot better than me. i doubt all of us are crazy good...
so, i assume the front page is a typo: "most people land around 0.02" (should be 0.002, not 0.02)? if yes, then i am back to not understanding the message i got about calibrating displays, because i did quite a bit worse than 0.002.
edit: nerd-sniping myself a little bit. but it appears (stressing: i know nothing) the "0.02" is accurate, but calculated by showing someone two colors and asking "are these different" until the person answers the question correctly 50% of the time. which is a different question than "where, precisely, is the line between these two colors". with the different question, it ends up compressing the result down by about an order of magnitude.
https://vectorization.eu/color-perception-test
It helps if I move side to side like a party parrot. I'd love to see a histogram of where I stand.
Okay, tried again and got 0.0034 which is still says is beyond the human limit! I'll have to give this to my mum because we often argue about colours and I suspect she might be a tetrachromat.
Both tests on a Pixel 10 btw
Had to turn off the "Night Light" (reducing blue) and set brightness to max.
But I think this kind of test can really be limited on your display and color profiles.
Most of my misses were on blues, but sometimes the line was obvious. Other times, I could “see” many phantom bars of slightly different colors.
And in bright sunlight, I can see variations in the film in my phone screen. I suspect this could affect a test like this.