--- title: Okmain | daily.dev description: A developer built Okmain, a Rust library (with Python bindings) for extracting visually pleasant dominant colors from images. The approach improves on the... canonical: https://daily.dev/posts/okmain-weiv96rpi twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Okmain | daily.dev og:description: A developer built Okmain, a Rust library (with Python bindings) for extracting visually pleasant dominant colors from images. The approach improves on the... og:url: https://daily.dev/posts/okmain-weiv96rpi og:image: https://api.daily.dev/og/posts/WEiV96rPI.png og:image:alt: Okmain og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Okmain **[Hacker News](https://daily.dev/sources/hn)** · 8 min read · 4 upvotes · 1 comments ## Summary A developer built Okmain, a Rust library (with Python bindings) for extracting visually pleasant dominant colors from images. The approach improves on the naive 1x1 resize trick by using k-means clustering in the Oklab perceptual color space instead of sRGB, applying center-weighted pixel prominence scoring, and optimizing for performance via downsampling, structure-of-arrays layout, and auto-vectorization. The post covers the algorithmic choices, performance tuning details, and a candid assessment of using Claude Opus via an agentic coding tool — finding it useful for boilerplate but unreliable for low-level SIMD-friendly code and clean abstractions. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@akkitto** · 0 upvotes > Could be very useful for Midjourney, too. ## Similar posts on daily.dev - [Creating a Color Palette from an Image — Amanda Hinton](https://daily.dev/posts/creating-a-color-palette-from-an-image-amanda-hinton-xk9e9debm) · Hacker News · 0 upvotes · 0 comments - [Color picking Oklch for mortals – Hugo Daniel](https://daily.dev/posts/color-picking-oklch-for-mortals-hugo-daniel-x8aaghqka) · Lobsters · 0 upvotes · 0 comments --- Tags: [#rust](https://daily.dev/tags/rust), [#computer-vision](https://daily.dev/tags/computer-vision) [View this post on daily.dev](https://daily.dev/posts/okmain-weiv96rpi) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Okmain","url":"https://daily.dev/posts/okmain-weiv96rpi","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/okmain-weiv96rpi"},"datePublished":"2026-03-13T13:51:54.981Z","dateModified":"2026-03-13T13:52:23.078Z","description":"A developer built Okmain, a Rust library (with Python bindings) for extracting visually pleasant dominant colors from images. 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