About This Site
WhatColors.xyz is a free educational resource dedicated to color theory, color mixing, and color science. Whether you're an artist wondering what two colors make purple, a designer checking color contrast for accessibility, or simply curious about the science of color — this site is for you.
We cover 60+ colors with detailed encyclopedia pages including HEX/RGB/HSL values, color mixing formulas (RYB, RGB, and CMY models), historical context, cultural symbolism, and design tips. Our interactive tools let you experiment with color mixing, compare colors for WCAG accessibility, simulate color blindness, and more.
All tools are free to use with no registration required. Our mission is to make color knowledge accessible to everyone.
Our Tools
Color Mixer
Mix colors using RYB, RGB, or CMY models with 16 preset palettes.
Color Compare
Compare two colors and check WCAG accessibility contrast ratios.
Color Picker
Pick any color and instantly get its HEX, RGB, HSL, and CMYK values.
Color Blindness Simulator
Simulate how colors appear to people with different types of color vision deficiency.
Color Converter
Convert between HEX, RGB, HSL, CMYK, and other color formats instantly.
Color Encyclopedia
Deep-dive articles on 60+ colors covering history, meaning, and mixing formulas.
Contact Us
Have a question, suggestion, or found an issue on the site? We'd love to hear from you.
We typically respond within 2–3 business days.