Tutorials Video

Dorothy Nickerson: Making Colour Measurable

By Infinite Creation · Profile

Historical photograph of Dorothy Nickerson.

At a Glance

Dorothy Nickerson (1900-1985) spent her career at the US Department of Agriculture and in colour standards work, developing methods for specifying and measuring colour objectively. She contributed substantially to the Munsell system's renotation, devised the Nickerson Color Fan, and worked through the standards bodies that make colour communicable between people who never meet.

Lived: 1900-1985, United States
Anchor year: 1936, colour measurement infrastructure
Strand: overlooked, metrology is invisible

Career

The problem as it stood

Colour was described in words. "Golden""ripe""buff" mean different things to different people, which is useless when grading agricultural produce, specifying paint, or agreeing a film print between a laboratory and a studio in another city.

What she actually did

Nickerson developed practical instruments and procedures for specifying colour numerically, including the Color Fan for field use, and worked on the mathematical renotation of the Munsell system that put it on a measured perceptual basis. She published extensively on colour difference formulae and tolerances.

How it worked

A colour order system arranges samples in perceptually even steps along hue, value and chroma, so that a numerical specification corresponds to something a person actually sees. Add a difference formula and you can state not only what colour something should be but how far off it is allowed to be, which is what a tolerance means.

What it made possible

Every downstream colour standard: paint, textiles, print, and eventually broadcast colorimetry and display calibration. The idea that a colour can be specified, transmitted as numbers and reproduced elsewhere is the foundation of colour management in every medium.

What happened to her

She received the Godlove Award of the Inter-Society Color Council and served in its leadership. Within colour science she is well known. Outside it, not at all.

Where the credit landed

Nickerson's field is metrology, which is systematically invisible: standards work produces documents and committees rather than products. She is also one of very few women in this corpus, and her area, measurement infrastructure rather than headline invention, is exactly the kind of contribution that invention-shaped histories omit by construction.

Known For

A tolerance requires a colour difference formula: you cannot specify "close enough" without one.
Perceptually even spacing is what makes a colour order system useful.
Colour management in every medium descends from this kind of work.

Knowledge Base

What You'll Learn

Colour becomes engineering the moment it becomes a number.

Why perceptual spacing matters

Wavelength is a physical measure and a poor perceptual one: equal steps in wavelength are not equal steps in appearance. A colour order system arranged in perceptually even steps means the numerical distance between two specifications predicts how different they look. That is what allows a tolerance to be meaningful, and it is why colour difference formulae are still actively developed for display and print calibration today.

Where This Fits

Colour measurement lets colour survive each link of the chain covered in A History of Broadcast Technology.

FAQ

Q: What is the Munsell system?
A: A colour order system specifying colours by hue, value and chroma, arranged so that equal numerical steps correspond to roughly equal perceived differences. Nickerson contributed substantially to its mathematical renotation.

Q: Why does colour need measuring at all?
A: Because words are not reproducible. Specifying, transmitting and reproducing a colour between people and machines that never meet requires numbers and agreed tolerances: the basis of all colour management.

Vocabulary

Colorimetry. The measurement of colour as numbers, so that two samples can be compared objectively rather than by eye. The basis of every colour standard and every colour management system.

Colour difference. A numerical measure of how far apart two colours are perceptually. Needed because equal numerical steps in a colour space do not correspond to equal perceived differences.

Tolerance. The permitted deviation from a specified colour before a sample counts as a failure. Turns colour from an opinion into a pass or fail decision that a supplier and a buyer can both apply.

Colour space. A defined system for describing colours as numbers, so a value means the same thing in two places. Different spaces suit different purposes, and converting between them accurately is what colour management exists to do.

Sources

The report was checked against its publication record. Checked 20 August 2026.

S. M. Newhall, D. Nickerson and D. B. Judd, Final Report of the OSA Subcommittee on the Spacing of the Munsell Colors. Journal of the Optical Society of America, volume 33, issue 7, from page 385, July 1943. This is the Munsell renotation named above. Nickerson is second of three named authors, alongside Sidney M. Newhall and Deane B. Judd, on a committee report rather than a single-author paper.