While this is just a static 2d image, it looks like blue is above the screen (for me, for some others it’s below, or red is above).

Thanks to comments, here some explanations https://en.wikipedia.org/wiki/Chromostereopsis

Edited: added Wikipedia link

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22 points

Okay so what’s going on here? This is the first time I’ve seen this illusion without my glasses, though it’s stronger with.

I see the blue further back; the red sticks out forward to me. And I’ve seen that with colours on my screen and - I think - printed colours too sometimes.

Or is this something else, about the blue being a bit fuzzier or something? (In which case my own colour depth separation is something else.)

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3 points

I’m guessing it’s the fuzziness of the blue one (less focus), but also both red segments being wider/thicker so your brain rationalizes that blue is further away

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2 points

I’ve noticed this effect on business signs so I don’t think that’s the cause. Blue specifically seems affected, and you can notice a parallax difference too even when they’re the same distance. I assumed it had to do with my glasses bending the light differently or something.

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2 points

I’ve definitely seen it when the colours are in focus/sharpness the same, e.g. with red words on my phone screen standing out in front of the rest.

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2 points
*

https://en.wikipedia.org/wiki/Chromostereopsis

Found courtesy of another comment

Edit: oh and now I see OP also already got the link

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1 point

Blue isn’t fuzzy or blurry though. It’s just as crisp and sharp as red, digitally speaking.

But yes, without glasses, I get the same sort of experience, where the blue gets blurry before the red.

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1 point

Red and blue are on opposite side of the visible spectrum.

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12 points

Yeah blue looks sunk to me too

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2 points
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