About
What this is
365Lab Color is a completely free collection of online color tools built to make choosing colors simple and reliable. Whether you are a designer, front-end engineer, indie hacker or just picking colors for a slide deck, you should get a usable result in seconds.
Tech & privacy
The whole site is static. Every calculation — color space conversion, CIEDE2000 difference, WCAG contrast, image extraction, vision simulation — runs locally in your browser. There are no accounts, no personal data collection, your images never leave your device, and favorites live only in localStorage.
Color standards
Conversions assume the sRGB gamut with a D65 illuminant. LAB / LCH follow the CIE formulas, color difference uses CIEDE2000, and contrast judgments follow the W3C WCAG 2.1 specification, so results line up with professional design software.
License
Every value, palette and code snippet produced here is free to use in personal and commercial projects. No attribution, no licensing, no fees.
Our team
365Lab Color is built by a focused and lean team. We believe good tools should be free for everyone — like air. That is the same principle the 365Lab home site has stood by.
Privacy first
Every color calculation runs locally in your browser; nothing is uploaded, your palettes stay yours.
Free forever
All tools are free forever — no hidden fees, no paywall, no feature limits.
Great experience
Clean, intuitive and fast, on desktop, tablet and phone alike.
Always improving
We keep polishing existing tools and ship new color capabilities for more use cases.
If 365Lab helped you, share it with a friend or visit our main site to discover more handy tools.
Contact
Spotted a bug, want a new tool, or just have feedback? Email us any time — we read every message.