Tetradic Color Wheel
Tetradic schemes combine two complementary pairs into a rectangle on the wheel — the richest harmony rule, best with one dominant hue.
Four hues in a rectangle — rich, complex schemes.
Color tools
More free color tools
Palettes, gradients, accessibility checks, and print-ready conversions — all in one place.
- Color Palette Generator
Generate harmonious palettes from one color — complementary, triadic, analogous, and more. CMYK values and print gamut warnings included.
- CSS Gradient Generator
Build linear, radial, and conic CSS gradients with live preview. Copy production-ready code instantly.
- WCAG Contrast Checker
Check color contrast ratios against WCAG 2.1 AA and AAA. Includes palette matrix mode and auto-fix suggestions.
- Tint & Shade Generator
Turn one brand color into a Tailwind-compatible 50–950 scale with WCAG contrast badges on every swatch.
- Palette from Image
Extract dominant colors from any photo — runs entirely in your browser. Send colors to converters or palette tools.
- Color Blindness Simulator
Preview palettes as seen with protanopia, deuteranopia, or tritanopia. Essential for accessible design.
- Print Gamut Checker
See exactly how a screen color shifts when printed in CMYK. Side-by-side press preview with shift warnings.
- Compare Colors (Delta E)
Measure the perceptual difference between two colors with ΔE2000 — plus HEX, RGB, CMYK, and HSL values for both.
Explore all harmony rules on the main interactive color wheel, or lock and refine swatches in the tetradic palette generator.