A curated list of awesome resources to choose your next color scheme

🌈 Tints and shades of a given hex color in 5%, 10%, or 20% increments.

APCA (Accessible Perceptual Contrast Algorithm) is a new method for predicting contrast for use in emerging web standards (WCAG 3) for determining readability contrast. APCA is derived form the SAPC (S-LUV Advanced Predictive Color) which is an accessibility-oriented color appearance model designed for self-illuminated displays.

🎨 Perfect Material Design palettes from any hex color.

SwiftUI Front-End Design Skills — Six Ironclad Rules Against AI Sloppiness, Design Direction Consulting, Brand Asset Guidelines, and Five-Dimensional Review. Supports all AI agent platforms, including Claude Code, Cursor, Codex, and OpenCode.

A perceptual palette analyser.

Classybrew is a utility for generating statistical class breaks in your data and applying colorbrewer theory to you color palette.

A SCSS starter to create palettes based on color wheel schemes.

Web-based toolkit for pixel artists featuring palette generation, shading, blending, and color workflow tools.

Physics-based color mixing for 3D printer filaments using Kubelka-Munk theory.

Color-theory palette generation and interpolation in C++ (with or without openFrameworks).

RLabs Inc. Website and apps. Featuring the VSCode Themes Community and a Warp Terminal themes generator.

a collection of color tools

🎨🧰 A versatile collection of color tools for designers and developers encapsulated in one web app - shades, tints, tones, harmonies, contrast, color blindness, gradients, and more!

a node.js color model system

Tints and shades generator in React.

A browser-based color science instrument for exploring RGB gamuts as interactive 3D solids, inspecting the full stimulus-to-display pipeline, and building perceptual theme ramps.

Color Ramp Generator

Functionalities to work with colors. Cast colors types, find closest color using text-embeddings, find color complement.

🎨🍭 An iOS utility framework for working with colors.