# Twenty-two Colors of Maximum Contrast

Canonical URL: https://colorcurio.us/library/kelly-22-colors
Source type: Library entry
Resource URL: https://doi.org/10.1364/AO.4.000419
Added: 2026-09-27

## Summary

Twenty-two colors chosen to stay distinguishable in sequence — the ancestor of every maximally distinct palette.

- Resource: [Twenty-two Colors of Maximum Contrast](https://doi.org/10.1364/AO.4.000419)
- By: Kenneth Kelly
- Published: 1965
- Kind: references (article)
- Level: intermediate
- Tags: color-scales, perception, scientist, research

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