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Build interface colour scales with shade curves and contrast targets.

Edit one colour across familiar web formats and wide-gamut OKLCH.

Build machine learning apps in Python

Generate five-colour palettes while keeping selected colours fixed.

Inspect colour values and CSS examples, then browse community palettes.

Use colour schemes and colour-space operations in D3 projects.

Compare colour references, build complements and convert colour data.

Compare camera images in original and simulated colour-vision views.

Browse named web colours, related swatches and downloadable colour icons.

Create related palettes and CSS gradients from existing colour values.

Trace photographic and film colour processes through documented examples.

A written Python route from setup to practical topics

Python articles, tutorials and community news

Share colour configurations and transforms across visual production tools.

Calculate returns, portfolio statistics and allocation weights in Python

Build Python web applications by pairing a small request-and-route core with the extensions your project needs.

Test entry and exit rules against historical price bars

Maintain event-driven Python backtests with the Zipline research model

Develop Python strategies with graphical backtesting and market gateways

Assemble portfolio backtests from reusable Python rules

Connect financial data providers to Python and research applications

Composes Python components into retrieval, search, and agent pipelines for AI applications.

Fit, evaluate, and reuse Python models for common supervised and unsupervised machine-learning tasks.

Build browser colour grades with reusable exports and shared review.