Who is it for?
- Useful for building color scales that meet a WCAG contrast target for an interface or design system.
- Useful for producing sequential and diverging color scales for data visualization.
Leonardo Color — Create a Color Palette
Adobe
Leonardo is an open source Adobe color tool that generates color scales and adaptive themes from a target contrast ratio, treating accessibility as a starting point.
Why it fits
| Good to know | Website |
|---|---|
| Free output | — |
| No account needed | — |
| No watermark | — |
| Works offline | — |
| Batch processing | — |
| Content language | — |
— Unverified conditions. Official documentation reviewed. The app itself has not been hands-on tested. Matches only documented content-language support, not interface language.
Sources and review date2
Founder feedback and correction
Editorial selection guide
Last checked:
Getting started
- Open the web app at leonardocolor.io; no installation is needed.
- Set your colors and a target contrast ratio; the tool generates swatches from it, and you can adjust brightness, contrast and saturation.
- Download the scale or theme as SVG, or export it as CSS custom properties or design tokens.
Decision points
- Consider it when you want to set colors by contrast target before aesthetic preference.
- If you want to browse ready-made palettes or pull colors from a photo, you need another tool; this one generates contrast-based scales and themes.
Limits
- No ready-made palette gallery or image color extraction was seen on the pages reviewed; the tool focuses on contrast-based scales and themes.
- GitHub states the Apache-2.0 license for the project's code; no separate license statement was seen for the color output you generate.
Frequently asked questions
Is it paid?
No pricing or plan information was seen on the pages reviewed; the official page presents Leonardo as an Adobe open source project and the GitHub repository shows the Apache-2.0 license.
Is it the same as Leonardo.Ai?
No; this entry covers the leonardocolor.io color tool, an Adobe open source project. The image generation service Leonardo.Ai is a separate product.