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

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

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.

Automate Czech invoice reminders and payment matching

Embed Perl-compatible regular-expression matching in applications through a portable C library.

Collect image colours and compare nearby colour-system references.

Use colour-science tables with explicit sampling, metadata and citations.

Build browser colour grades with reusable exports and shared review.

Add a configurable colour and opacity picker through a web input attribute.

Convert colour values and collect palettes for design or code.

Turn a text description or photograph into a colour palette.

Model paint-like colour mixing in a JavaScript application.

Inspect public IP and approximate geolocation data

Convert colour spaces and model perception-related transformations in Python.

Use the Mac colour panel with shortcuts, recent colours and palette export

Build colour scales around shared lightness levels and contrast checks.

Chain colour transformations while keeping earlier values unchanged.

Inspect device colour ranges, profile conversions and measurement data.

Find named, community-contributed gradients for design and code.

Compare how six picker models organize colour choices.

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