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Build a resizable colour picker with optional fields and alpha controls.

Choose a React colour picker or compose one from building blocks.

Generate production PDFs from HTML, CSS, and JavaScript

Audiobook membership for people who cannot use print

Generate interface themes from target contrast ratios and colour scales.

Extract image palettes with sampling, crop and colour-space controls.

Use named colour levels across interface code and design swatches.

Compare colour pairs interactively or check a complete palette in code.

Build colour scales and preview their roles in interface layouts.

Catalog print books, ebooks and audiobooks together

Add a jQuery colour control with palettes, transparency and saved choices.

Change a colour matrix and see how it transforms an image.

Explore named colours and turn selected values into gradient steps.

See how traditional Sass colour adjustments transform a starting swatch.

Search palette ideas by theme or hex value and export the colours

Edit colour stops and transparency while viewing the resulting CSS

Cycle through palettes with adjustable hue, lightness and interpolation.

AI icon generator that turns short text prompts into app icons in under a minute.

Measure displays, generate colour-correction tables and verify the result.

View text contrast through different vision and lighting simulations.

Compare a text and background pair with editable colour values.

Attach a dependency-free colour popup to a page element.

Inspect a full-screen colour-vision simulation across applications.

Accessible ebooks for readers with print disabilities