Open-source · Free forever

Every color.
All 16.7 million of them.

Thefree,open-sourcestudioforcolor,palettes,branding,andtypography—builtintheopen,foreveryone.

Built by:aardevaas
Explore Every ColorStar on GitHub

Six rooms.One system

  1. 01

    library

    All 16.7 million of them, computed on demand rather than pulled from a list somebody curated.

  2. 02

    compose

    One color in, a whole system out — reconciled against the gamut rather than clipped to it.

  3. 03

    scales

    Every color deepened into a ramp, with sRGB, Display P3 and Rec2020 marked on every step.

  4. 04

    visualizer

    Proof on real interfaces rather than swatches, audited live as you change it.

  5. 05

    typography

    Because contrast is a property of type, not just of color. The boundary, drawn.

  6. 06

    brand

    The guideline your team follows, written from what you built — and re-measured every time you change it.

Open-source, you’re welcome.

Licence
MIT
Depend on the color engine in your own work.
Working space
OKLCH
Perceptually uniform end to end, which is what makes ordering by lightness mean anything.
Gamuts
sRGBDisplay P3Rec2020
Every step of every ramp marked in all three, with a separate mapping for what print can hold.
Formats
HEXRGBHSLCMYK
Read in and written out around the same OKLCH core, so nothing drifts on the round trip.
Standards
WCAG 2.2APCA
The compliance number and the perceptual one, carried together rather than one standing in for the other — with ΔEOK for difference and four models of color blindness.