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Adjust CSS colour pairs and inspect their changing contrast ratio.

Build an eleven-step scale and export variables for a web project.

Edit a colour system in perceptual coordinates and copy design tokens.

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

Replace text in files or streams with a compact, readable command-line syntax.

An open-source in-memory data-structure server for caching, queues, and key-value workloads.

Turn address text into OpenStreetMap place results, or look up an address from coordinates.

Use a cross-platform SQL database engine that ranges from embedded and single-user use to multi-client deployments.

Connect standard PostgreSQL clients to managed Postgres with built-in connection pooling.

Experiment with image filters and editable adjustments

Pick screen colours, adjust their values and keep small Windows palettes.

Recreate target images with CSS in scored challenges

Customizable SVG drawings with inline and sprite integration guidance.

Build composable Python command-line interfaces from decorated functions.

Apply selective color adjustments to RAW photos

Connect browser colour picking with shareable palettes and scales.

A free icon family with framework packages and a searchable JavaScript API.

Keep a small set of color-coded text notes close at hand across Apple devices.

Parse flexible colour input and generate conversions, adjustments and harmonies.

Use a curated dataset of colour names and hex values.

Generate intermediate colours between chosen endpoints.

Separate images for selected spot inks using dedicated colour profiles.

Look up colour values, compare shades and prepare interface palettes.

Render HTML and CSS into PDF from a command line or Python