Blue fireworks look cool, but you almost never see them.

[0] https://smartmuseum.uchicago.edu/exhibitions/building-enviro...

I make photo prints using the cyanotype process and a UV LED light source. It's a combination of old and new technologies with a very unique look. While the sensitizing solution contains cyanide, it's fine as long as you wear gloves (and don't drink it).

For any subject, there is certainly someone who's written more eloquently about it than Scott Alexander (who's quoted using the word "pissed" here).

For me it is because of red- and blueshifting[1]. Far away galaxies appear both older and redder the further away they are, so red is the past. And if you go really fast, the forward view will be bluer, so in the sense that it is where you go, blue is the future. [1] https://en.wikipedia.org/wiki/Redshift#Blueshift

The reason is that the crystalline structures that finely select for that narrow band of blue are destroyed. The same thing happens if you put an oil drop on water: at first brilliant rainbow bands of color are produced (from the selective reflections off either side of the oil, where the oil thickness is a multiple of the light quarter-wavelength). Then the oil spreads further, until it is less thick than a blue light quarter-wavelength, and it turns dark.

Blue of course is a cold color. Perhaps one of the less eccentric colors, and ubiquitous as the author mentions. So in line with the disappearance of color from modern design, it is one of the few remaining colors in our vision of the future.

"Cultural associations: ... Something something near-far Robin Hanson something something"

[1] https://radiolab.org/podcast/211119-colors

For the 45th anniversary of the Shenzhen Special Economic Zone last month, the building lighting and rooftop lasers were coordinated with a 12,000 drone show.[2] Mostly white, some blue tinge, red buildings on the more official messages. Not much green. That's Shenzhen looking futuristic on purpose.

[1] https://www.youtube.com/watch?v=1Vz3mP3iMiw

[2] https://www.youtube.com/watch?v=FDNkcKiD2Ow

https://www.amazon.com/Blue-History-Color-Michel-Pastoureau/...

Alizarin crimson behaves similarly.

Painting with either of these pigments it is relatively easy to get superficially impressive effects.

As a painter and also a digital artist, I am always amazed by such physical dimensions of oil paint. Another example is the huge difference between zinc white (low in coverage, good for transparency, slightly cold), and titanium white (high in coverage, good with mixing with other pigments, more neutral).

Could the fascination be due to psychological reasons, like blue light being linked to sleep difficulties? This seems to be the current world we live in, where blue light filters exist to help prevent sleep disorders. Perhaps because our skies are increasingly gray with pollution, so blue gives us hope of a future where our air is clean and without smog?

I might be missing the entire point of the article, but I feel that if I am, my fellow HNers are with me (even if they don't believe the same thing).

So we're at that stage ? Scott Alexander asking Claude for estimates on unknown stuff and quoting it on that. Gosh, I didn't imagine the lack of awareness of the limits of LLMs was this bad.