Credits & Licences
The JUMI Colour Generator is built with open-source typefaces, used under permissive licences. The tool itself — all colour-harmony algorithms, HSL maths, WCAG contrast calculations, gradient builder, and UI logic — is original code written by JUMI Ltd, with no third-party JavaScript or CSS frameworks. With gratitude to the authors below.
Typefaces
All three typefaces are served via Google Fonts and licensed under the SIL Open Font License 1.1, which permits free use, modification, and redistribution in any software.
Used for body copy and UI labels throughout the tool.
Designed by Mikhail Sharanda. © 2018–2023 The Manrope Project Authors.
Used for headings and display text.
Designed by Florian Karsten. © 2018–2021 The Space Grotesk Project Authors.
Used for hex codes, labels, monospaced values, and exported code snippets.
Designed by Colophon Foundry for Google. © 2016 The Space Mono Project Authors.
Accessibility standard
The contrast-ratio formula and WCAG pass/fail thresholds used in the Contrast Checker are derived from the Web Content Accessibility Guidelines (WCAG) 2.1, published by the W3C Web Accessibility Initiative (WAI). WCAG is an open standard; the specification is freely available under the W3C Document License.
No other third-party code
The JUMI Colour Generator contains no npm packages, JavaScript frameworks, CSS frameworks, or runtime dependencies beyond the browser itself. All colour science, palette-generation algorithms, gradient builder, WCAG calculations, export formatters, and UI rendering are original work by JUMI Ltd.
Services
- Google Fonts — typefaces are loaded from Google's font CDN. See Google Fonts privacy FAQ for details on what data is processed.
- Google Analytics (GA4) — used with your consent to understand aggregate, anonymous usage. See our Privacy Policy for full details.
Intellectual property
The JUMI Colour Generator name, logo, and all original source code are © JUMI Ltd 2026. All rights reserved. The open-source components listed above remain the intellectual property of their respective authors and are used in accordance with their licences.