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

Adjust CSS colour pairs and inspect their changing contrast ratio.

Browse compact four-colour combinations with visible hex values

See how a colour pair performs for different text sizes.

CC0 photography with subject and colour browsing

Five-colour palettes drawn from named paintings and their artists

Find replacement colours that meet a chosen contrast target.

Choose a starting colour and explore a related scheme.

Define JavaScript and TypeScript schemas that validate data and infer its types.

Unicode emoji artwork with a JavaScript text-to-image parser.

Install Node.js project dependencies with a package manager built for efficient storage and workspaces.

Format and lint web-project files with a shared command-line toolchain.

Add interactive, mobile-friendly maps to a web page with a JavaScript library.

Add small reactive interactions to HTML with directives such as x-data, @click, and x-show.

Write and run JavaScript end-to-end tests across local browsers and remote grids.

Call models from multiple inference providers through Hugging Face's shared SDK and API interface.

Write load-test scenarios as code and control the request rate sent to an application.

Add automated accessibility rule checks to an existing browser UI test flow.

Turn text definitions into editable diagrams for software design notes and documentation.

Capture application errors with context and correlate them with performance and deployment changes.

Stroke icons drawn for small 16 px interface spaces.

A Windows editor for source and text files with configurable syntax highlighting and Perl- or JavaScript-style regular expressions.

Build component-based web interfaces with a compact library that shares a React-compatible API.

A browser editor for creating, sharing and remixing p5.js sketches without local setup.