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Calculate colour from spectral samples and compare the results in Python.

Look up colour values, compare schemes and calculate blends.

Start from one colour and preview a palette in an interface.

Inspect colour codes, build harmonies and extract palettes from images.

Named gradient references with colour values and a companion Chrome tool

Explore historical colour names through swatches and natural examples.

Build colour harmonies and carry their swatches into Adobe projects.

Sample a foreground and background pair and copy its contrast report.

Adjust text and background colours while checking their contrast.

Audit individual web pages and turn failed checks into concrete optimization leads.

Build palettes around a fixed colour and carry them into gradients

See how a colour pair performs for different text sizes.

Browse shared palettes, gradients and image-based colour inspiration.

Build interface colour scales with shade curves and contrast targets.

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

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.

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

AI-powered CRO audit for eCommerce sites

Create related palettes and CSS gradients from existing colour values.

Trace photographic and film colour processes through documented examples.

PDF remediation with automatic tagging and guided review