Gradients, Hypercolor, Huetone & Prism are useful.
Color and Contrast is a good read. Mixbox is nice library for color mixing.
- Color Hunt
- Handpicked list of 18181 unique color names from various sources and thousands of user submissions
- Colormind - Color scheme generator that uses deep learning.
- Building Your Color Palette (HN)
- Cloudflare Design - Preview palettes against UI elements.
- pastel - Command-line tool to generate, analyze, convert and manipulate colors.
- Image Color Picker - Image color picker and palette generator.
- Branition Colors - Color pallets best fitted for brands.
- Contrast - MacOS app for quick access to WCAG color contrast ratios.
- Sip - Better way to collect, organize & share your colors.
- Designing accessible color systems (2019)
- SRCERY - Dark color scheme.
- Who can use this color combination?
- Happy Hues - Color palette inspiration site that acts as a real world example as to how the colors could be used in your design projects. (Nice palette)
- The Hitchhiker's Guide to Digital Color - Light-hearted introduction to understanding digital color reproduction.
- Brown; color is weird (2020) (HN)
- The Weird World in RGB (2019)
- Pywal - Tool that generates a color palette from the dominant colors in an image.
- HSLuv, a developer friendly perceptual color space (2020)
- HSLuv - Human-friendly HSL. (Code) (rust-hsluv)
- colors.lol - Overly descriptive color palettes. (Code) (HN)
- Color gradient generator
- Not Another Gradient Generator - Create complex, layered color gradients as CSS, SVG, or Raster Images.
- Building dark mode on Stack Overflow (2020) (HN)
- Duo - Collection of color combinations that I've curated from personal projects or that I've come across on the web. (HN)
- color-scheme.js - Generate nice, pretty color schemes with JavaScript. (Code)
- Themer - Takes a set of colors and generates themes for your development environment (editors, terminals, wallpapers, and more). (Code)
- Color Names - Collaborative effort to name every color in the RGB/web space. (HN)
- Chromotome - Collection of color palettes saved for personal use. (Code)
- Research links on color theory (2020)
- A short history of color theory
- 35+ white paint colors that top designers swear by
- Scale - Generative way to create color scales. (Code)
- Sanzo Wada - Dictionary of Color Combinations. (Code)
- Palettes from A Dictionary of Colour Combinations
- Color Copy Paste - Copy & paste colour directly from your camera to Figma/Sketch/Chrome. (Code)
- Perceptually Smooth Multi-Color Linear Gradients (2020)
- Piggment - The gradient you have always wanted.
- Material Design Palette Generator (Code)
- Colour Theory On 80 Display Boards (1944)
- Color Palette Generator
- Coolors - Super fast color schemes generator.
- atcq - Implementation of Ant-Tree Color Quantization (ATCQ), described by Pérez-Delgado in various papers.
- Color contrast checker, analyser and color suggestions
- Adobe Color - Color wheel, a color palette generator.
- iroiro - Beautiful Colors Lookup in CLI.
- consistent-shading - Shade consitency for various hues, based on luminance.
- Sorted CSS Colors - Sort the named CSS colors in a way that it shows related colors together. (Code)
- Cascading Colors - Generate dynamic and themable color palettes using CSS custom properties, and allow (persistent) user-adjustments with a bit of light-weight JS. (Code)
- Basic Color Science For Graphics Engineer (2018)
- Bjango Color Creator Templates - Photoshop, Sketch and Affinity Designer documents that use base colors to generate larger palettes.
- Palettte App (Explanation)
- Reasoning about colors (2020) (Lobsters)
- How do humans perceive color? (2020)
- Random Color Cycler (Code)
- Colorable - Color combination contrast tester. (Code)
- How software gets color wrong (2020)
- Random color generator for JavaScript (Code)
- Practical Color Theory for People Who Code (2016)
- Color Craft & Counterpoint: A Designer’s Life with Color Vision Deficiency (2020)
- Conic.css - Nice, simple conic gradients. (Code)
- HSL: a color format for humans (2021)
- Mesh - Create beautiful mesh gradients.
- Poulette - Color Palette GUI. (Demo) (HN)
- Colord - Tiny yet powerful tool for high-performance color manipulations and conversions.
- A Guide to Color from 1692 (HN)
- Paletter - Create professional color palettes. (HN)
- culori - Comprehensive color library for JavaScript. (Web)
- Mindfully curated color palettes - Collection of unique color combinations for your design projects.
- Towards richer colors on the Web (2021) (HN)
- Radix Colors - Gorgeous, accessible color system. (Web)
- Cone - Live Color Picker.
- 100 Mesh Gradients - Make your website beautiful with mesh gradients.
- Using HSL Colors In CSS (2021)
- How to make nice gradients in CSS
- Why we're blind to the color blue (HN)
- How WCAG color contrast ratio works (2021)
- colorful gradients - Gradients automatically created by a computer.
- Accessible Colors - Automatically find the closest accessible color combination. (Code)
- ColorBox
- color-algorithm - JavaScript function for producing color sets. Used to build Lyft's color system (Spectrum) and power ColorBox.
- An interactive review of Oklab (2021)
- New alternatives to HSL and HSV that better match color perception (HN)
- Accessible Palette - Create color systems with consistent lightness and contrast. (Tweet)
- Accessible Palette: Stop using HSL for color systems (2021)
- NO_COLOR - Disabling ANSI color output in various Unix commands. (Code)
- FettePalette - Color palette generation function using curves within the HSV color model.
- The Geometry of Color Perception (HN)
- CSS gradient resampler
- Sunlight affects whether languages have a word for ‘blue’ (2021) (HN)
- colorio - Tools for color research.
- LCH Color picker (Code) (Tweet)
- Pick a color (Code)
- Color Accessibility for Tailwind CSS (Code)
- Shadowlord - Tints and Shades Generator Tool. (Code)
- Harmonic Coloring - Method for assigning colors to musical pitches. (HN)
- A Guide To Modern CSS Colors With RGB, HSL, HWB, LAB And LCH (2021)
- Inkspot - Small Clojure/ClojureScript library for creating color swatches.
- Dynamic Color Manipulation with CSS Relative Colors (2021) (Tweet)
- Every Color Picker - Color picker components. Framework independent. (Code)
- dominant_colours - CLI tool to find the dominant colors in an image.
- Design Tip: Never Use Black by Ian Storm Taylor (2012) (HN)
- Coloring With Code — A Programmatic Approach To Design (2021)
- Color-changing magnifying glass gives clear view of infrared light (2021) (HN)
- Base16 - Architecture for building color themes for many apps. (HN)
- WCAG 3's new color contrast method called APCA (Advanced Perceptual Contrast Algorithm)
- Huetone - Tool to create accessible color systems. (Code) (Tweet)
- APCA (Advanced Perceptual Contrast Algorithm) - New method for predicting contrast for use in emerging web standards (WCAG 3) for determining readability contrast. (Web)
- How we will write colors in CSS in 2022-2023 (Russian)
- colorgram.py - Python library that lets you extract colors from images.
- TinyColor - Fast, small color manipulation and conversion for JavaScript.
- Color-Description - Turns a technical color representation into a human readable description. (Code)
- Shade Generator - Generate shades and tints of a given input color. (Code)
- Colorquant - Go library for color quantization and dithering.
- Polychroma - Better gradients through color spaces. (Code)
- Design Gradients - Free platform of 48 linear gradients curated by designers.
- ColorSchemes.jl - Color schemes, colormaps, gradients, and palettes.
- Meshy - Design tool to generate beautiful & colorful mesh gradients. (Code)
- CSS Gradient Generator
- Color-space - Math & data behind color spaces and color conversions.
- Leonardo - Generate colors based on a desired contrast ratio.
- A Pixel's Color (HN)
- hue.tools - Open-source toolbox for colors. (Code) (HN)
- OKLCH Color Picker
- Every Color - Example site which uses Netlify's On-Demand Builders to generate millions of color reference pages. (Code)
- Vue gradient picker component (Code)
- Huemint - AI color palette generator. (HN)
- Open Source Color System
- 60-30-10 Color Rule
- colo - Displays colors in various color spaces.
- Simpler Color - Create your own complete color system fast and easy. (HN)
- Meshed Up - Collection of multi-color vectors for web developers and digital designers.
- Chroma.js - JavaScript library for all kinds of color manipulations.
- Colour - Python package providing a comprehensive number of algorithms and datasets for color science.
- A detailed guide to colors in data vis style guides (2022)
- Nord Palette - Arctic, north-bluish color palette. (Code) (HN)
- uiGradients - Beautiful colored gradients. (Code)
- Stripe Gradient Effect (Code)
- Pigmnts - Color palette generator from an image using WebAssesmbly and Rust.
- Whatamesh - Easily create mesh gradients like Stripe. (Code)
- color-contrast - Visualizing relative luminance contrast within sRGB colorspace.
- Reasonable Colors - Open-source color system for building accessible, nice-looking color palettes. (Code)
- node-vibrant - Extract prominent colors from an image.
- color.js - Extract colors from an image.
- Hypercolor - Gradients for Tailwind CSS. (Code)
- Mesh Gradients inside Sketch
- Web color is still broken (HN)
- OKLCH Color Picker (Tweet)
- Why OKLCH is the future of colors in CSS
- The Color API - Pass in any valid color and get conversion into any other format, the name of the color, placeholder images and a multitude of schemes. (Code)
- distinctipy - Lightweight package for generating visually distinct colors.
- Plasma - Eye-candy pixel plasma randomized generator - for the desktop and the web. (Code)
- Image editors often get color wrong (2022) (HN)
- Thread about canvas rendering optimization for the OKLCH color picker
- theme-colors - Easily generate color shades for themes.
- Benjamin Moore Paints as CSS Colors (Code)
- How to pick the least wrong colors (2022)
- Ambient - Generate contrast-safe colors for UI/UX. (Code)
- Primer Prism - Tool for creating and maintaining cohesive, consistent, and accessible color palettes. (Code)
- Accelerating GitHub theme creation with color tooling (2022)
- Color Thief - Grab the color palette from an image using just JavaScript. Works in the browser and in Node.
- Gradient Avatars - Generate a gradient profile image based on some text. (Code)
- Color.js - Color conversion & manipulation library by the editors of the CSS Color specifications. (Code) (Article) (Article) (Color.js Released) (HN)
- Easing Gradients (Code)
- Better Color Tools - Color parser and better color manipulation through the power of science. Uses Oklab/Oklch for better color operations.
- colornamer - Given a color, return a hierarchy of names.
- 365 days of color
- a11y-color-contrast - TypeScript package to calculate WCAG 2.0/3.0 and APCA color contrasts.
- Gradientos - Makes it easy to choose gradients. (Code)
- Iris - CLI tool that creates color palettes from images using the median cut algorithm.
- Color Gradient - High-performance JavaScript color gradient library powered by Rust + WebAssembly. (Code)
- Penumbra Color Theme - Perceptually optimized color palette based on natural light. (HN)
- Fast Average Color - Fast Average Color.
- Color and Contrast - Interactive guide to color & contrast. (Tweet)
- color-contrast in CSS
- How to make a Color Picker in Unity
- Splashy - Given an whatever image (GIF, PNG, WebP, AVIF, etc) extract predominant & palette colors.
- #HEXWORDS - Small web-app to filter from a list of hex colors that are similar to words. (Code)
- Ok Color Picker - Pick colors using the Okhsv and Okhsl color spaces. (Code)
- Palette - Colorize Photos.
- Everything you need to know about color in design
- Randoma11y - Accessible color combinations. (Tweet)
- CSS mesh gradients generator
- Blending Modes (HN)
- OKLCH in CSS: why we moved from RGB and HSL (2022)
- glasbey - Generate maximally distinct sets of colors.
- Whimsical Watercolors (HN)
- Glasbey Categorical Color Palette Tools
- A 900-Page Pre-Pantone Guide to Color from 1692: A Complete Digital Scan
- The 12-bit rainbow palette (HN)
- 271 years before Pantone, every color imaginable in an 800-page book (2014) (HN)
- Named Colors Wheel (HN)
- Mixbox - Library for natural color mixing based on real pigments.
- Color Pals - Collection of curated color palettes. (Code)
- Turn a text description into a color (Code)
- Tailwind CSS 10-color Palette Generator and API (Code)
- Quick tip on creating gradients