Ryan Feigenbaum

Color Palette Pro — A Synthesizer for Color Palettes Generate customizable color palettes in advanced color spaces that can be easily shared, downloaded, or exported.

At first, I thought I could just rotate the hue of HSL colors and call it a day. Since then, I've learned about perceptual color spaces, OKLCH, Bezold-Brücke effect and I still can't always get good programmatic palettes 😅

But I built Color Palette Pro to help get us halfway there: colorpalette.pro

Discover how GrowthBook is revolutionizing A/B testing and experimentation with powerful AI features! In this demo, GrowthBook CEO Graham and Developer Advocate Ryan showcase the latest AI-powered… Introducing GrowthBook AI: 6 New Features for Smarter Experimentation

Graham and Ryan demo all the new AI-powered features recently released in GrowthBook.

The best part? Every AI prompt is fully customizable. Want results in haikus? Different language? Your company's tone of voice? You control it all.

youtu.be/jhyGxknbGk0

Does Your Website Even Have an iPod? And is the PonoPlayer next?

My site has a playable iPod and here's how I did it

ryanfeigenbaum.com/does-your-we...

10 years later, Sufjan Stevens offers a startling reevaluation of 'Carrie & Lowell' : All Songs Considered In a conversation with All Songs Considered's Robin Hilton, Stevens shares a complex and conflicted view of the album he wrote about his mother in the wake of her death from cancer.Enjoy the show? Sha...

Can't believe it's been 10 years since Carrie & Lowell. I resonate with this, I think: "I find as I get older, experience makes fools of us all—I feel kind of stupider and less prepared for what life brings me in a lot of ways.... I'm just becoming more zen" www.npr.org/2025/05/27/1...

Size Your Images Perfectly with This Tool Stop guessing at sizes attribute values and letting performance optimizations slip by. Size Writer measures your images across viewports and generates the exact sizes values you need.

I got tired of manually figuring out `sizes` attributes for responsive images, so I built a CLI tool to do it automatically 🤖 ryanfeigenbaum.com/size-your-im...

I built an MCP Server for GrowthBook ✨ it's early days, but the possibilities are incredible.

This MCP Server is truly useful and makes feature flag management so much easier.

How do you know your feature actually works in prod? Use Safe Rollouts to catch regressions early, letting you ship faster and more confidently 💪

Some days, experiments can't be clearer: ship, ship, ship. Other days, though, they don't give you a clear answer. They give you context, nuance, trade-offs. Our Experiment Decision Framework (EDF) helps cut through the noise, so you can make a more confident decision.

Here's how it works 🧵

force rule UI in GrowthBook

May the Force (rule) be with you.

#MayThe4thBeWithYou

GrowthBook 3.6 is live
- Safe Rollouts for metric-guarded launches
- Time Series View in experiment results
- Official Jira Integration to keep the PMs happy
- Decision Framer Events/API for custom workflows
- Dev Tools for SSR apps (yep, backend friendly now)
- JSON column support in Fact Tables

Are you teaching to the test? Breeding cobras? Letting the measure become the target?

Goodhart's Law reminds us, "When a measure becomes a target, it ceases to be a good measure."

This comes up all the time in A/B testing and experimentation.

Frank (Danny DeVito) as Andy Warhol vs my toy poodle, Mel, sporting a eerily similar haircut.

Who wore it better? Frank or Mel?

Better typography with text-wrap pretty Support for text-wrap: pretty just shipped in Safari Technology Preview, bringing an unprecedented level of polish to typography on the web.

I’m super excited about `text-wrap: pretty`. It does a lot more to improve typography than you might expect — at least in Safari Technology Preview 216.

It improves all lines of text, not just the last 4. It enhances hyphenation & rag, not just avoiding short last lines.

webkit.org/blog/16547/b...

Title slide for the presentation, Beyond Boolean, which features a large mountain with a tiny orange feature flag on top

I'm speaking today at #KubeCon London, as part of the #OpenFeature summit. Come hear my talk, Beyond Boolean, where I discuss some of the challenges teams face when flagging at scale and how we help you solve those problems at @growthbook.io

This meeting could've been an email. And that email could've been a slack message. And that slack message could've been whispered quietly into a well.

Shareception! The share button I built, in action on my website, being used to share a blurb about the share button.

ryanfeigenbaum.com/share-this-s... #webcomponents

Our Dev Tools have been completely revamped for easier debugging and testing of feature flags and experiments. The update simplifies understanding user assignments to specific variations and is now available on both Chrome and Firefox! 🛠️

The first Senators to actually do anything about the Trump admin

Cincinnati

Yes, this administration is dangerous and cruel, but they are also shockingly dim and incompetent.

Opportunities are everywhere.

Make everything as hard as possible. Resist every demand. Refuse entry without a warrant. Don’t take the buyout. Their problem solving skills are 📉

Stop compromising between customization & convenience. With Custom Fields and Pre-Launch Checklists, you get all the power of a totally bespoke experimentation platform—without having to build it yourself

DECEMBER 22, 1951
ARTIST: Will Cotton
ADVERTISEMENT: Old Grand-Dad
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#newyorkercovers #newyorker #newyorkermag #illustration #1951 #willcotton #christmaspageant #backstage #curtain #vintageads #oldgranddad #kentucky #bourbon #kentuckybourbon #whisky

time to review my CSS wrapped 2024

Tried and true: `.wrapper`
“Modern CSS”: `flex-wrap: wrap`
Least fun: `white-space: nowrap`
Most chaotic: `overflow-wrap: anywhere`
Easiest win: `text-wrap: balance`
Dear Santa: `text-wrap: pretty`

Music listens for the year including DIIV and Skinshape as top artists and The Wind and Little Martha as top tracks

My listens in 2024. What's not included: Spending 5 minutes looking for something to play and then forgetting to ever to hit play 😂

Oh, and SAVE BANDIT ❤️

growthbook.framer.website

YouTube video by GrowthBook Bandits speedrun default settings first try, part 1 (3:58.96)

I did a speedrun 😂 video for @growthbook.bsky.social, testing out our new bandit experiments.

I created 5 variations for the fictional Raccoon Rescue in under 4 minutes. www.youtube.com/watch?v=UAxc...

Watch a world-first speedrun: Setting up a multi-armed bandit test in GrowthBook | Final Time: 3:58.96See how quickly we can configure a complete bandit expe... Bandits speedrun default settings first try, part 1 (3:58.96)

🚀 Bandit Speedrun Challenge!

Launched Bandits in GrowthBook last week, so we had to test: how fast can you go from zero to a live experiment? ⏱️

Our time: under 4 minutes. Think you can beat it? 🕹️ Test your speed 👉 https://bit.ly/4g2OZbH

Experimentation just got fun.

Do you know Twyman's Law?
It says that if your results stand out or are surprising, then it's likely due to an error in data collection, analysis, or interpretation. It's a reminder to be skeptical when the results seem too good to be true. Womp womp. #statsky #datascience

Damn good haul 👏 Is that OGD new?