2026-06-07 12:12 UTC
Replies (40)
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@conchoid@mastodon.gamedev.place 2026-06-07 12:15
@Danpiker@mathstodon.xyz i don't see it
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@mwichary@mastodon.online 2026-06-07 12:30
@Danpiker@mathstodon.xyz Oh, wow. It does, and incredibly quickly and intensely, too.
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@otacke@chaos.social 2026-06-07 12:41
@Danpiker@mathstodon.xyz Where is the :hover pseudo-class set? 😅
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@kcanales02@mastodon.social 2026-06-07 12:43
@Danpiker@mathstodon.xyz Cool! Thanks for this. I recently watched a YT short on color theory. That was insightful and interesting.
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@hypercube@social.linux.pizza 2026-06-07 12:46
@Danpiker@mathstodon.xyz holy moly that's an incredible effect
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@forteller@tutoteket.no 2026-06-07 13:02
@Danpiker@mathstodon.xyz This is trippy as hell! I also feel like the border is more distinct when it's purple, but I can't really check because they all turn purple when I look at them! 🤯
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@davidtheeviloverlord@mastodon.social 2026-06-07 13:05
@Danpiker@mathstodon.xyz Yes. Whichever dot I focus on turns purple.
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@cford@toot.thoughtworks.com 2026-06-07 13:06
@Danpiker@mathstodon.xyz Not at first, because I was wearing yellow-tinted sunglasses. When I took them off yes.
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@mrblubber@chaos.social 2026-06-07 13:13
@Danpiker@mathstodon.xyz Fascinating! If you force your focus slowly moving towards a circle you can even get a gradiant.
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@ArneBab@rollenspiel.social 2026-06-07 13:14
@Danpiker@mathstodon.xyz That’s neat! thank you!
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@BLTpizza@mastodon.social 2026-06-07 13:17
@Danpiker@mathstodon.xyz Holding my phone at arms length all of the dots are purple.
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@daniel_bohrer@chaos.social 2026-06-07 13:17
@Danpiker@mathstodon.xyz interestingly it works better for me on the smaller thumbnail than on the full version of the image
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@mhwombat@mastodon.social 2026-06-07 13:24
@Danpiker@mathstodon.xyz For me, the dot that I'm looking at doesn't change, but the remaining dots fade into the background.
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@PhilSalkie@mindly.social 2026-06-07 13:24
@Danpiker@mathstodon.xyz Have a look at: https://gamesx.com/misctech/visual.htm Your eyes have much lower resolution in blue light than in red or green, the article demonstrates that increasing the size of the blue pixels by 9 times (3x3) makes an almost imperceptible change in the image. Link rot has taken the extra images and a diagram showing a proposed pixel layout of a big blue diamond surrounded by small red and green squares.
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@RLetot@mamot.fr 2026-06-07 13:30
@Danpiker@mathstodon.xyz Amazing, I feel like my smartphone can track my eyes 😃
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@howtophil@mastodon.social 2026-06-07 13:32
@Danpiker@mathstodon.xyz It turns... a slightly darker blue, I think?
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@cherieherrjones@mastodon.social 2026-06-07 13:33
@Danpiker@mathstodon.xyz I definitely see it. Very cool!
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@beckermatic@mastodon.la 2026-06-07 13:45
@Danpiker@mathstodon.xyz It also creates a blue trail when I scroll the image up and down. Neat!
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@axel_hartmann@digitalcourage.social 2026-06-07 13:49
@Danpiker@mathstodon.xyz - where to use? guest bathroom wallpaper or tablecloth
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@bytebro@mastodonapp.uk 2026-06-07 13:53
@Danpiker@mathstodon.xyz Doesn't seem to 'work' for me. I have no colour blindness of which I'm aware!
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@itgrrl@infosec.exchange 2026-06-07 13:57
@Danpiker@mathstodon.xyz a #ProTip for those playing along at home – if you have “night shift” (iOS) or “eye comfort” (Android) on you’ll probably need to turn it off to see the effect, otherwise all the dots will just look purple 💁♀️
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@dsandler@mastodon.social 2026-06-07 13:58
@Danpiker@mathstodon.xyz what's fascinating about this is that, as someone with deuteranomaly, _none_ of the dots is obviously purple for me, on any background. they all seem "blue, but if you told me they're actually purple, I would believe you", which is just really common for me. that must mean that the amount of short-wavelength sensitivity loss in the fixated area is not enough to offset the confusion (and overall lower information content) of overlapping long/medium wavelength response?
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@wcbdata@vis.social 2026-06-07 14:11
@Danpiker@mathstodon.xyz TIL (from someone who said "this doesn't really work") - this doesn't work if your phone has a blue-light-blocking filter on it!
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@bodhipaksa@mastodon.scot 2026-06-07 16:40
@Danpiker@mathstodon.xyz This worked for me. Sometimes two or three dots on the same row would appear purple. If I keep my focus fixed on one dot the others often disappear. (MacBook Pro monitor.)
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@VaylLarkinPoet@disabled.social 2026-06-07 16:42
@Danpiker@mathstodon.xyz I had the same issue as others, of being unable to look Only at one dot. When I stopped trying and just let my vision kind of skate between them though, they All started turning purple, which was cool. (Will mention I have both visual processing junk and non-Blind visual disabilities, but maybe anyone who switched focus often enough would get this?) ... Now I'm trying to figure out how to determine the periodic exposure necessary to maintain purple for all, oh no! ...rolls nerdily off
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@atif@mathstodon.xyz 2026-06-07 16:44
@Danpiker@mathstodon.xyz works on phone, but not on pc! (night light turned off)
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@irina@wandering.shop 2026-06-07 17:01
@Danpiker@mathstodon.xyz All the dots look purplish to me anyway. Perhaps very very slightly.
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@EllenB@mastodon.social 2026-06-07 17:03
@Danpiker@mathstodon.xyz Yep, immediately. Do I have a super power?
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@Cazzandro@mathstodon.xyz 2026-06-07 17:19
@Danpiker@mathstodon.xyz yes! Magic....
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@OliverUv@mastodon.social 2026-06-07 17:35
@Danpiker@mathstodon.xyz yes!
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@FaithfullJohn@mastodon.scot 2026-06-07 17:42
@Danpiker@mathstodon.xyz
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@meyltje@beige.party 2026-06-07 17:56
@Danpiker@mathstodon.xyz Yes, immediately! Wow...
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@allancavanagh@mastodon.social 2026-06-07 18:49
@Danpiker@mathstodon.xyz blown away by all the replies of those that don’t see it!
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@raymaccarthy@mastodon.ie 2026-06-07 18:50
@Danpiker@mathstodon.xyz No effect even when made big on my AOC 4K (maybe) 23" HDR monitor.
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@stevegis_ssg@mas.to 2026-06-07 19:03
@Danpiker@mathstodon.xyz This doesn't work on me (at all; I see no hint of an effect) but my particular flavor of colorblindness makes blue-purple one of the very hardest distinctions.
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@jeantranscene@mastodon.social 2026-06-07 19:04
@Danpiker@mathstodon.xyz yes, that's a nice one. I've always wondered if those were flaws in our design or if it gave us some sort of evolutionary advantage, and if the latter how so.
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@tlfm@mastodon.scot 2026-06-07 19:10
@Danpiker@mathstodon.xyz It REALLY seems to depend on the screen one is using. I first saw this using my desktop monitor and the purpleness of the dot was staggering. Now, seeing the same image on my laptop, there's almost no purple. If I had only seen it using the laptop, I would be convinced that the effect doesn't work for me. I guess the colour gamut of different screens is important for this illusion to work...
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@softproof@mastodon.social 2026-06-07 19:16
@Danpiker@mathstodon.xyz Pretty neat trick, I like it. Next we need one to corroborate what B-Bob in Fargo said about why we can see more shades of green than any other colour.
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@Lemniscate@infosec.exchange 2026-06-07 19:19
@Danpiker@mathstodon.xyz My eyes don’t work together very well so things like this always look pretty wild to me. The deeper purple jumps all around and I sometimes see deeper purple on multiple far apart spots at a time.
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@laemmerbiss@digitalcourage.social 2026-06-07 20:14
@Danpiker@mathstodon.xyz Works for me. But putting focus on a dot the others begin to vanish, broadening the focus lets the color become equal. So it's more a state of mind too not only sectoral sensitivity.