Open-source alternatives to TinyColor

Color-thief is a color quantization library and image color palette extractor designed to identify the most prominent colors in visual media. It functions as a semantic color classifier and color space converter, providing tools to extract dominant colors and generate representative palettes from images, videos, and canvas elements. The project utilizes a WebAssembly color processor and background workers to perform high-performance pixel analysis. It implements a WCAG contrast analyzer to calculate color contrast ratios and determine accessible foreground text colors based on accessibility s

Chameleon is a color framework for Swift and Objective-C applications, providing a toolkit for managing dynamic palettes, gradient libraries, and hexadecimal conversions. It functions as a system for creating harmonious color schemes and calculating contrasting text colors based on background luminance. The project includes an image color extractor that analyzes images to generate matching color schemes or calculate average colors for user interfaces. It also features a gradient color library for creating and applying smooth transitions to backgrounds and text elements. The framework covers

mini.nvim is a comprehensive library of independent modules designed to extend Neovim with a wide array of navigation, user interface, and text manipulation tools. It serves as a modular plugin collection, a UI toolkit for creating custom statuslines and notifications, and a package manager for installing and pinning external plugins from Git. The project provides a specialized fuzzy picker framework for filtering files and symbols, an LSP completion engine with interactive snippet expansion, and a dedicated plugin test framework that uses headless editor instances and remote procedure calls

Stylus is a CSS preprocessor that transforms a dynamic language into standard CSS. It utilizes a compilation workflow to enable the use of variables, nesting, and arithmetic, which are then rendered into stylesheets for use in frontend asset pipelines. The project is distinguished by a flexible syntax that allows for indentation-based styling, meaning curly braces, colons, and semicolons can be omitted. It further differentiates itself through a JavaScript-driven plugin pipeline and the ability to extend the native syntax with custom JavaScript functions for complex logic. Its capability sur

vibrant.js is a JavaScript color extraction library used to identify dominant color palettes from images based on the Android Palette algorithm. It functions as an image palette generator and a color processing tool that converts extracted data between RGB, HSL, and Hexadecimal formats. The library analyzes image pixels to categorize colors into specific profiles, including vibrant, muted, dark, and light. It also includes an accessible text color calculator that determines high-contrast hex colors for text overlays based on a selected background color. The toolset covers automated palette g

Polished is a specialized toolkit for programmatically managing color palettes, converting CSS units, and optimizing style execution at build time. It provides a set of functions for manipulating colors, sizes, and spacing within JavaScript styles to maintain consistent visual themes. The toolset includes a color manipulation library for adjusting lightness, saturation, and transparency, as well as a CSS unit converter for calculating size values between pixels and rems. It also functions as a static style compiler that resolves static styling function calls during the build process to elimin

nightfox.nvim is a customizable Lua-based color scheme for Neovim and Vim. It provides a comprehensive visual theme with dedicated support for language server protocols, Tree-sitter, and various editor plugins. The project distinguishes itself through accessibility features, using daltonization and color simulation to increase contrast for users with color vision deficiency. It also enables dynamic theme development via hot-reloading configuration state, allowing users to refresh the active color scheme without restarting the editor. The system includes programmatic color space conversion an

Pywal is an image-based theme engine and dynamic color scheme generator that extracts dominant colors from images to create coordinated system-wide color palettes. It functions as a cross-application theme synchronizer and terminal color palette manager, updating interface colors and environment configurations in real-time. The system synchronizes generated palettes across third-party software, window managers, and supported hardware, including RGB backlight controllers for keyboards and laptops. It integrates wallpaper management by applying a source image as the system background while simu

mdui is a framework-agnostic UI library and design system based on Material Design 3 standards. It provides a comprehensive set of reusable interface elements implemented as native Web Components, ensuring compatibility across different JavaScript frameworks. The library features a sophisticated theming system that supports light and dark modes, as well as the ability to generate dynamic color palettes from seed colors or image sources. It distinguishes itself with a high level of flexibility in visual customization, using CSS custom properties to control design tokens such as typography, cor

Lygia is a GLSL shader library providing a specialized suite of tools for color science, image filtering, noise generation, and implicit surface geometry. It serves as a collection of reusable functions for fragment shaders to handle color space conversion, image processing, and geometric rendering. The project is distinguished by its focus on cross-language shader management, allowing reusable functions to be synchronized across different shading languages to ensure consistent graphics behavior across multiple engines. It also implements a system for remote shader dependency resolution, fetc

The Book of Shaders is an interactive educational guide and curriculum for learning GLSL fragment shader programming to create procedural graphics and visual effects. It provides a structured learning path and a categorized reference guide for data types, built-in functions, and mathematical operations used in shader development. The project features a web-based shader sandbox and interactive editor that allows for real-time iteration and visualization of GLSL code. Users can experiment with procedural art and share their results via unique URLs. The curriculum covers a wide range of graphic

Mixbox is a specialized simulation engine for modeling fluid color dynamics, pigment-based hue shifts, and latent space color blending. It functions as an RGB color mixing simulator that uses pigment-based simulations and latent space interpolation to produce realistic results. The project incorporates a Kubelka Munk color engine to achieve physically accurate hue shifts and saturated gradients. It also utilizes a latent space color blender to transform colors into latent representations for precise linear interpolation and multi-color mixing. The system covers fluid dynamics for calculating

This project is a multi-purpose REST API utility collection and developer suite. It serves as a centralized service for real-time information aggregation, data transformation, and a wide array of programmatic tools. The service distinguishes itself by providing a broad range of specialized content delivery endpoints, from curated daily summaries and global trending rankings to randomized entertainment content like jokes and quotes. It also functions as a real-time aggregator for environmental and network data, including weather forecasts, currency exchange rates, and public IP lookups. The c

This project is a comprehensive front-end development guide and roadmap designed to help engineers master the skills and professional standards required for modern web development. It serves as a technical reference for mastering HTML, CSS, and JavaScript, providing structured learning paths and a map of the professional competencies needed to transition from a beginner to a professional web engineer. The resource functions as a categorized directory and ecosystem overview of the JavaScript landscape. It catalogs industry-standard frameworks, libraries, and utilities, offering specific recomm

Gogh is a terminal emulator color scheme manager and command-line theme installer. It provides a collection of color palettes and tools to browse and apply visual themes across different terminal environments. The project utilizes a standardized library of themes defined in YAML format, allowing for a structured collection of color schemes. It includes a contrast validator that checks these schemes against WCAG accessibility standards to ensure legible text and background contrast. The system covers terminal styling and customization through an interactive selection interface, terminal detec

Chameleon is a color framework for Swift and Objective-C applications. It provides systems for programmatic color palette generation, global theme orchestration, hexadecimal conversion, and the extraction of visual data from images. The library includes a dynamic theme engine for applying global visual styles and luminance adjustments across an interface. It features a palette generator for creating analogous, complementary, and triadic color schemes based on a seed color, and an image color extractor to derive average colors or palettes from images. The framework covers a range of color man

Chalk is a Node.js console formatter and terminal styling library used to add colors and text modifiers to command line output. It functions as a tool for formatting strings with foreground colors, background tints, and text styles using ANSI escape sequences. The library includes a terminal color support detector that automatically determines the color depth and capabilities of the current environment. It features an ANSI color downsampler that converts RGB, Hex, or 256-color values to the nearest compatible format based on the detected terminal capabilities. The project provides capabiliti

FastLED is a C++ library for driving pixel-addressable LED chipsets and strips across various microcontroller platforms. It functions as an addressable LED control library and driver abstraction layer that converts color data into specific electrical timing for different hardware protocols. The project includes an audio-reactive visual engine for translating real-time beats and frequency data into synchronized animations, alongside a microcontroller math library optimized for high frame rates. The system provides a unified interface for managing various clockless and SPI LED chipsets. It dist

Oklch-picker is a web-based tool for selecting perceptually uniform colors and converting legacy values into the OKLCH color space. It functions as a color space converter that translates color codes between traditional formats like hexadecimal, RGB, or HSL and modern spaces while maintaining perceptual uniformity for design workflows. The application includes wide gamut display preview capabilities that show how color choices appear across different display gamuts. It features automatic fallback indications and P3 color space status displays to verify device and display compatibility and ens

This project is a design-to-development handoff guide and UI design audit framework. It provides a structured collection of requirements and checklists to verify that visual assets, component architectures, and technical specifications are ready for implementation. The framework focuses on standardizing web asset management through naming conventions and format verification for images, icons, and fonts. It includes specifications for responsive web design, ensuring that mobile and tablet layouts and fluid grid systems are defined for cross-device consistency. The guide covers quality assuran

Photon is a high-performance image processing library written in Rust. It serves as a pixel manipulation toolkit and image format transcoder, providing a WebAssembly graphics engine for executing visual effects and transformations directly within web browsers. The project is built around a functional image pipeline, which allows for the programmatic chaining of sequential transformation operations. This architecture supports the creation of complex visual effects through a coded pipeline. The library covers a wide range of image processing capabilities, including color management across mult

This project is a CSS stylesheet compiler that transforms Sass source code into standard CSS. It provides the primary mechanism for converting styles while implementing syntax rules for web browsers and applications. The compiler supports a module-based dependency system that uses dedicated namespaces to provide encapsulation and prevent global scope collisions. It includes specialized engines for multi-model color conversion and advanced mathematical calculations, including trigonometry and logarithms. Capabilities cover a broad range of build and analysis tools, including the generation of

This project is a curated collection of galleries and component libraries that demonstrate pure CSS visual effects, 3D transforms, animation patterns, and layout solutions. It serves as a visual catalog of interactive UI elements and graphics built exclusively with HTML and CSS. The collection distinguishes itself by implementing complex interactivity, such as state management and animation triggers, using only CSS pseudo-classes and keyframes without any JavaScript. It also features a system for generative art and algorithmic patterns, as well as spatial 3D constructions using perspective an

This project is a JetBrains IDE extension and source code colorizer that assigns distinct colors to nested pairs of brackets and braces. It serves as a code nesting visualizer for the IntelliJ platform and Android Studio to help identify matching pairs and clarify the structural hierarchy of source code. The plugin provides capabilities to apply rainbow color schemes to both brackets and variables to make them easier to track within a file. It also includes a color palette generator and options to exclude specific languages or file extensions from highlighting. The tool further assists with

design.md is a design system specification format and toolchain that defines a visual identity through structured, machine-readable design tokens embedded in a human-readable Markdown document. It combines exact token values with prose explanations of design intent, enabling coding agents to consistently apply brand styles across a project while keeping the rationale accessible to human designers. The project provides a linter that validates design specification files for structural correctness, broken token references, and WCAG color contrast compliance, outputting structured findings. It al

Gogh is a command line theme manager and a collection of curated color palettes for various Linux and macOS terminal emulators. It provides a library of configuration files used to synchronize visual styles across different terminal environments. The project includes a terminal accessibility checker to verify that chosen color schemes meet visual contrast and readability standards. It allows for the creation of custom theme definitions using a templating system that maps hex values to text and background colors. The toolset covers terminal emulator customization through a command line interf