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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
628•klaussilveira•12h ago•185 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
929•xnx•18h ago•547 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
34•helloplanets•4d ago•26 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
110•matheusalmeida•1d ago•28 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
43•videotopia•4d ago•1 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
10•kaonwarb•3d ago•7 comments

Start all of your commands with a comma

https://rhodesmill.org/brandon/2009/commands-with-comma/
7•theblazehen•2d ago•0 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
221•isitcontent•13h ago•25 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
212•dmpetrov•13h ago•103 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
323•vecti•15h ago•142 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
372•ostacke•19h ago•94 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
359•aktau•19h ago•181 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
478•todsacerdoti•20h ago•232 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
275•eljojo•15h ago•163 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
402•lstoll•19h ago•272 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
85•quibono•4d ago•20 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
25•romes•4d ago•3 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
16•jesperordrup•3h ago•9 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
56•kmm•5d ago•3 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
13•bikenaga•3d ago•2 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
244•i5heu•15h ago•189 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
52•gfortaine•10h ago•21 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
140•vmatsiiako•17h ago•63 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
281•surprisetalk•3d ago•37 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1058•cdrnsf•22h ago•433 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
133•SerCe•8h ago•118 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
70•phreda4•12h ago•14 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
177•limoce•3d ago•96 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
28•gmays•8h ago•11 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
63•rescrv•20h ago•22 comments
Open in hackernews

Show HN: Find matching acrylic paints for any HEX color

https://acrylicmatch.com/
56•dotspencer•3mo ago

Comments

Dwedit•3mo ago
Paint is subject to the effects of radiance. How paint looks changes depending on the surrounding lighting in the room, including the colors of other walls and objects which the light bounces off. So even if you could pick out a color from a perfectly calibrated display, then look at it under ideal white light and see that it matches, it won't look the same when painted on actual walls.
esafak•3mo ago
Don't downrate, (s)he's right. If you are going to paint something, paint a sample foamboard or something and view it in the right context. It is remarkable how the color of paint can be affected by its surroundings as it refracts and reflects. It will look rather unlike the pictures in the catalog if your lighting conditions are different.
snibsnib•3mo ago
I used to work in a paint lab. Things things that also affect perceived color include:

- Undercoat color

- Number of coats

- Gloss Level

- Size of colored area

- Surrounding Colour

- Combination of tinters used by each brand. (Different tinters can make colours metameric)

- Light Source (Incandescent, D65, LED, Fluorescent)

- Monitor Color Space (sRGB, DCI-P3)

- Color Space / Model used for conversion (Lab, Luv, Lch)

- Colour Difference dE Model Used (CIE76, CMC, CIE00)

- Precision and spectral range of the spectrophotometer used.

Etc

ChrisMarshallNY•3mo ago
Yup. It’s called “metamerism.”

With most paints, the medium used can affect color, as well as aging. I used to use Ph Martin watercolor dyes, and they were notorious for fading after a relatively short time. The illustrations that I colored with them, are now monochrome. I’m sure they’re better, now. Pigment science has come a long way. Acrylic was always a lot longer-lasting.

Also, context matters. Our perception changes, based on surrounding colors. There’s a bunch of optical illusions that leverage this.

But I think this is kind of a cool project.

Isamu•3mo ago
So this is nice, you seem to be covering the acrylic brands you see in a craft store. I’ve had to pick nearest colors in the past, and end up buying several each time. This should help, thanks! Are there artists brands in there too?
cluckindan•3mo ago
For those who don’t know, the main difference between craft store paints and artist grade paints are:

- ratio of pigment to binder (craft store paints have less pigment)

- pigment quality (craft store paints are usually larger grain and may sometimes use unsafe pigments)

- color purity and consistency (craft store paints may contain traces of unintended pigments and may vary between batches)

- color variety (craft store paint manufacturers are NOT going to be paying extra for rare pigments)

- lightfastness (craft store paints may fade quicker due to lack of UV protectant additives)

- binder quality (craft store paints may use cheaper, more toxic binders)

Otherwise they are the same stuff, it’s kinda hard to screw up mixing acrylic binder with a pigment.

Check that your paint has the ACMI Approved Product seal.

https://www.acmiart.org/acmi-seals

dotspencer•3mo ago
Yeah so far I've only added brands you can find in craft stores (FolkArt Matte, Apple Barrel, and DecoArt Americana)

Any specific artist brands you'd want to see added?

nick238•3mo ago
Matching additive colors (RGB) to subtractive (CMYK, though even in mixed paints there are dozens of tints) feels fraught with peril.
o11c•3mo ago
More like "fundamentally impossible". Even ignoring the limited colorspaces due to choices of primary (i.e. the fact that no laser's color can be emitted by a screen), and assuming you calibrate your "white" (most screens are overbright these days), it turns out the pigments are really bad at "reflect exactly this pure-ish wavelength and absorb everything else", which is very frequently done by emitters.
brookst•3mo ago
Perhaps OP is offering a first approximation and not attempting an impossible platonic ideal?
dotspencer•3mo ago
Yeah the goal was simply to find the closest paints for specific RGB values from a reference image for a pointillism project I was working on.

I wasn’t trying to do the impossible and find the absolute perfect real-world color match. Just something close given the limited palette of acrylic paint brands I could find locally.

specproc•3mo ago
You know what would make this more awesome? Getting Citadel and Vallejo on there.
wwilim•3mo ago
I am absolutely sure putting a ```<div class="wash" style="background-color: nulnoil"></div>``` over your entire page can make any website look good

Also, try IONIC paints, they are awesome

specproc•3mo ago
So much love for this comment
dotspencer•3mo ago
I can definitely try to make that happen!
schobi•3mo ago
It would be interesting to learn how this was created.

Did you buy all these colors and paint and scan them? Did you analyze the shopping images of the bottles and classify them into hex colors? Or maybe just group by the color names given in the storefront listing?

Vastly different efforts, different "accuracy", but still, each methods has its use. But knowing what to expect would be nice.

dotspencer•3mo ago
I pulled out the RGB values from the solid color areas of the swatch images on the manufacturers' websites for each of the colors.

It's definitely just an approximation of the real-world color, but I figured that if that's the RGB value the manufacturer used, it's probably pretty close.

Then I calculate the euclidean distance between the RGB value from the provided hex and each of the paints, and show the two closest matches from each brand.

bstsb•3mo ago
i would definitely try to get yourself on affiliate programs, this looks like a useful tool and just adding your code to the end of Amazon redirects could earn you a (admittedly small) cut
Kostchei•3mo ago
damn, i was looking for army painter and citadel ranges :p