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

A selected weekly reading list for JavaScript

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.

JavaScript language lessons followed by browser programming

Generate a short sequence of gradient stops from supplied colours.

A Scratch-derived block-programming editor with a compiled runtime and JavaScript extension support.

Write JavaScript load tests and run them locally or send performance tests to Grafana Cloud.

A browser editor for micro:bit projects with Blocks, JavaScript, Python, and a device simulator.

Run JavaScript and TypeScript with a runtime that includes testing and explicit permission controls.

A project-based JavaScript and TypeScript IDE with code navigation, refactoring, testing, and debugging tools.

Write HTML, CSS, and JavaScript in a browser editor with an updating preview.

Run JavaScript and TypeScript projects with a combined runtime, package manager, test runner, and bundler.

Create interactive 3D scenes for the web with a JavaScript scene graph and renderer.

A Windows web-code editor with language-aware tools, project navigation and FTP publishing.

Run unit and component tests in JavaScript or TypeScript projects using Vitest.

A JavaScript testing framework with readable behavior-driven specs and a Node command-line workflow.

Run JavaScript outside the browser for servers, command-line tools, and application scripts.

Build desktop applications with JavaScript, HTML, and CSS using a Chromium and Node.js runtime.

Build palettes around a fixed colour and carry them into gradients

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.