If you work on home renovations in Massachusetts, or anywhere in New England, you will eventually find your way to the Historic Colors of America list published by Historic New England. It is the definitive source for period-appropriate paint, built from actual pigment analysis of properties dating from the mid-1600s through the 1960s, meaning the colors were derived from physical evidence found on the buildings themselves, not from anyone's best guess about what a Colonial parlor should look like.

It also covers a much wider range than most people expect. Because the palette runs all the way to the '60s, it includes everything from Colonial and Federal earth tones through Mid-Century and International Style pastels, which means it is useful for the vast majority of the housing stock you encounter in New England, not only the museum pieces.

The problem is that it is a list of names, and a name like "Woodstock Rose" or "Knightley Straw" tells you absolutely nothing about what a color actually looks like until you are holding the chip in your hand.

California Paints

These colors are manufactured by California Paints, based in Andover, Massachusetts. They hold the exclusive partnership to produce this specific palette, and in the world of historic preservation, they are the correct answer. Their coatings are engineered specifically for New England's freeze-thaw cycles and high humidity, and their pigment accuracy is unmatched. If you need the exact chemical and visual match to a 1790s parlor or a 1940s exterior, there is no substitute.
The logistical reality, however, is that California Paints are not sold everywhere. Most contractors and homeowners I work with have a Benjamin Moore dealer on speed dial. And when a painter runs out of trim paint at 7:00 AM, they need a brand they can source immediately. That is not a failure of commitment to authenticity, it's just how job sites work.

Why Not Just Match In-Store?

This comes up every time, usually in one of two forms. The first is "can't they just scan a chip at the paint counter." The second is "can't we just match a piece of original shingle."

On the shingle: there is a logic to it, and if the client loves that exact weathered color and wants to honor it, fine. But you have no idea what that piece of material has been through. It may be sun-bleached, desaturated, turned by decades of exposure, or all three at once. You are not matching the original color, you are matching the current state of a surface that has been weathering since the Eisenhower administration. And even if you accept that, what happens in five years when that section needs repainting? You match the new paint to the old paint, which was already a match to a faded match. A copy of a copy of a copy of a hundred copies, it is like sending a fax across the centuries, and we all know how that ends even just sending one from Lancaster to Boston.

The scanner problem is different but equally reliable in its failure. The counters are frequently uncalibrated, and the complex pigment loads in historical colors tend to defeat them. What comes out of the machine looks close enough in the can and reveals its true nature once it is on a large surface in natural light, usually as an appalling green or pink cast that no one saw coming. By then the contractor has already painted the entire side of the house, and you have lost time, money, and your client's trust in a single afternoon. I am obsessive enough about color that I have never personally been on that job site, and I intend to keep it that way. This guide exists mostly to make sure I never am.

What I Built and Why

I took the raw data from the Historic New England list and identified the closest Benjamin Moore equivalent for every single color across all eleven architectural periods, using weighted RGB color-distance matching against the full Benjamin Moore catalog. The result is a visual reference that shows you the original California Paints color alongside its nearest BM equivalent, so you can actually see what you are working with.

There are several reasons this is useful beyond the obvious emergency-sourcing scenario.
The first is visualization. A list of period-correct color names is academically interesting and practically useless for building a mood board or having a real conversation with a client about what their house is going to look like. With Benjamin Moore, you can order a 9" x 14.75" peel-and-stick sample sheet through Samplize or directly through the Benjamin Moore website, stick it on the actual wall, and move it around as the light changes throughout the day. California Paints does not offer anything equivalent, they sell 8oz liquid sample pots through dealers, which means brush it on, wait for it to dry, and hope for the best. For a client trying to decide between ten exterior colors on a north-facing facade in November, that is not the same thing at all.

The second is that having the complete palette of a period in one place is genuinely useful as a design tool, in a way that browsing individual chips is not. When you can see all the colors of, say, the Shingle Style era on a few pages, you understand the tonal logic of the period in a way you simply cannot when you are looking at names on a list or pulling chips one at a time. One thing I noticed repeatedly while building this was how harmonically coherent each palette is on its own. These colors were not designed to go together by a committee or a brand, they were derived independently from physical evidence on actual buildings, and yet they work together with the kind of effortless coherence that no contemporary color collection quite manages to replicate. That is not a coincidence. It reflects the material and pigment constraints of each era, and it means that if you stay within a period's palette, the combinations largely take care of themselves.

For client work specifically, the PDF format makes this practical in a way a digital tool does not. This comes up in two scenarios more than any other: either the original color evidence on the house is gone and there is nothing to restore to, or the clients know what era their house belong to but have no interest in the color that was actually there. In both cases, the palette gives you a documented, period-accurate pool to work from rather than an open-ended color conversation that can go anywhere and usually does.
I send the relevant period pages to clients and ask them to go through and mark whatever catches their eye, without overthinking it. No context, no pressure, just instinct. What comes back is usually a remarkably coherent shortlist, because the palette is already doing the curatorial work. From there we run simulations with the selected colors on the actual property. It compresses what can otherwise be a sprawling and indecisive phase of a project into something focused and productive.

The third is consistency across project phases. Historic renovations rarely happen all at once. If work is done in phases over several years, having a BM fallback that was identified at the start means color matching across phases is a solved problem rather than a recurring headache.

One caveat worth stating plainly: period-accurate does not mean contextually appropriate. A purple house can be entirely defensible for its era and still be a disaster on a street of colonial yellows so you still have to look at what's around you. Don't be an après moi le déluge neighbor.

Why This Matters if You Are Working with a Historical Commission

Town commissions often have design guidelines, but they rarely specify which colors are appropriate for a given era. The City of Cambridge for example has a useful resource called "Painting Historic Exteriors: Colors, Application, and Regulation" that you can purchase if you are working in that jurisdiction.
If your town does not have something comparable, or if you are not under formal restrictions but want your renovation to be period-accurate, you can use this guide as a reference. It converts a judgment call into a documented design decision with a traceable source.

One Necessary Disclaimer

These are not exact matches. I used an AI-assisted weighted color-distance algorithm to identify the closest visual approximation in the Benjamin Moore catalog for each color, and even the best algorithmic match is still an approximation, paint is a chemical product, not a hex code. Lighting conditions, substrate, sheen level, and application method will all affect the final result on your specific wall.
This guide is a professional reference tool, not a guarantee. Before you commit to fifty gallons, buy a sample. Paint a test patch and look at it in morning light, midday light, and at dusk.
The responsibility for final verification is yours and your contractor's, not mine.
Pardon me for going full après moi le déluge on this one.

Ciao.

A quick note: This was a significant undertaking. If you use it in your professional work, cite the source, or go to Hades.

Download the guide below. And if you are working on a historic renovation in Massachusetts and want someone who has done this homework, get in touch.

The views expressed in this journal are my own and reflect my professional experience and personal opinions. Any references to specific places, institutions, or practices are made for informational and illustrative purposes only. Nothing in this journal constitutes legal, architectural, or regulatory advice. Always consult a qualified professional for your specific situation.

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