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

See curated palettes applied to page elements and copy their hex codes.

Cycle through palettes with adjustable hue, lightness and interpolation.

An interactive introduction to Python

Train a personal colour generator and search its combinations.

Browse compact four-colour combinations with visible hex values

Recover exact sprite colours or reduce an image to a smaller palette.

A common language for computational mathematics

Convert HTML and CSS into PDF without a browser engine

An engineering programming environment for developing algorithms, analyzing data, and visualizing results.

Browse curated palettes by colour, mood, season and popularity.

Beginner programming books available to read online

Balance colour distinction and visual preference for categorical charts.

A deterministic layer that lets agents make code changes across an entire code estate.

Python and TypeScript practice through coding missions

Run DuckDB-based analytics in a managed cloud warehouse and share results with a team.

Practice-led coding paths for data work

Deploy serverless JavaScript, TypeScript, Python, or Rust code to Cloudflare's edge network.

Inspect the product, model and market inputs behind a valuation

Render technical Markdown and notebooks into reports, books, slides, and websites.

Trace and investigate AI application calls with a local or self-hosted observability interface.

Host coded or visual strategies through shared broker connections

A desktop UI-test IDE that records, replays and reports tests against mobile apps, desktop programs and games.

Study an exploratory Python engine for historical equities tests