Leonardo vs PaletteWB
Leonardo
leonardocolor.ioPaletteWB
palettewb.comSide by side
| Figure | Leonardo | PaletteWB |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| API | Yes | — |
| Plans published | 1 | 2 |
| Spec score · Color Palette Generators | 7.5 (#16) | 8.4 (#4) |
| Exports | Themes and color scales can be downloaded as SVG files, and the tool offers Tableau XML and SVG exports for scales. | Palettes can be exported as rendered images, formatted text, or color cycling animations. |
| Purpose | Leonardo creates, manages, and shares accessible color systems for user interface design and data visualization. | PaletteWB is a Windows color palette editor for generating, importing, browsing, manipulating, applying, converting, and exporting palettes. |
Plans
In their own words
Leonardo
Leonardo is an open-source tool for creating, managing, and sharing accessible color systems for interface design and data visualization. Users can generate swatches from target contrast ratios or set target lightness, then adjust brightness, contrast, and saturation with adaptive themes. Sequential and diverging scales support data visualization. Accessibility tools can cycle through colorblind-safe palettes and compare color differences across color vision deficiency types, while charts and 3D models help evaluate themes. Themes and scales can be downloaded as SVG, and scales can also be exported as Tableau XML. Developer output includes parameters for @adobe/leonardo-contrast-colors, CSS custom properties, and design tokens. The related JavaScript package generates adaptive contrast-based colors and is installed with npm; its documentation includes vanilla JavaScript and React examples. The site also documents an MCP server for generating themes, checking contrast, converting colors, and creating palettes. The project is licensed under Apache V2 and has a free plan listed at free. One limitation is that generated contrast ratios can be slightly above requested values because RGB colors and color-space interpolation constrain exact results.