No. 12of 34 ·Color Palette Generators

Leonardo

Web · API

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Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Leonardo is ranked #12 of 34 in color palette generators on Freedom251. It runs on API, Web. There is a free plan.

Leonardo plans and pricing

All plans

Free / open source Free No paid plans or usage limits are stated on the opened pages github.com · 9 Oct 2026

Compared on color palette generators

Palette methods: both
Image extraction: Yes
Accessibility checks: Yes
Export formats: SVG, Tableau (XML), CSS, JavaScript, design tokens, CSV
Print color support: Yes

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The record

Purpose: Leonardo creates, manages, and shares accessible color systems for user interface design and data visualization.
Contrast based colors: It generates color swatches from target contrast ratios and also lets users define swatches by target lightness.
Adaptive themes: Adaptive themes let users adjust brightness, contrast, and saturation.
Data visualization: Leonardo offers sequential and diverging color scales for data visualization.
Color accessibility: The tools can cycle through colors for colorblind safe palettes and compare color difference across color vision deficiency types.
Color analysis: The web application includes charts and 3D models for evaluating color themes.
Exports: Themes and color scales can be downloaded as SVG files, and the tool offers Tableau XML and SVG exports for scales.
Developer output: Theme output includes parameters for @adobe/leonardo-contrast-colors, CSS custom properties, and design tokens.
JavaScript package: The @adobe/leonardo-contrast-colors package can generate adaptive contrast-based colors and is installed with npm.
Integrations: The package documentation includes examples for vanilla JavaScript and React, and the homepage says its output can be copied into design tools.
AI tooling: The site documents an MCP server with tools to generate themes, check contrast, convert colors, and create palettes.
License: The project is licensed under Apache V2.
Limit: Generated contrast ratios may be slightly higher than the requested ratio because available RGB colors and color space interpolation constrain exact values.
Audience: The project describes its web application as a collaborative tool for designers and engineers building color scales for user interfaces.
Price from: Free

Where it ranks on Freedom251

Best Color Palette Generators in 2026#12 of 34

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Sources

leonardocolor.io· checked 9 Oct 2026
leonardocolor.io/api.html· checked 9 Oct 2026
leonardocolor.io/ai-tools.html· checked 9 Oct 2026
github.com/adobe/leonardo· checked 9 Oct 2026